Eye color: Wikis

  
  
  




































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The perception of color depends upon various factors.
^ Human color perception is dependent upon the interaction of all receptor cells with light, and this combination results in nearly trichromic stimulation.
  • Molecular Expressions Microscopy Primer: Physics of Light and Color - Human Vision and Color Perception 27 January 2010 23:51 UTC micro.magnet.fsu.edu [Source type: FILTERED WITH BAYES]

^ Though this explanation gives an idea of eye color delineation, it is incomplete, and all the contributing factors towards eye color and its variation are not fully understood.
  • Changing Your Eye Color - Iris Color Facts 27 January 2010 23:51 UTC www.healthguidance.org [Source type: FILTERED WITH BAYES]

^ However, because of the blue rays in the iris, hazel eyes can sometimes appear more blue or gray, depending upon the colors worn by the individual.

These are the same eyes; however, depending on the light and surrounding hues, the eye color can appear quite different.
.Eye color is a polygenic phenotypic character and is determined by the amount and type of pigments in the eye's iris.^ What determines eye color is the pigment melanin.
  • bookofjoe: BehindTheMedspeak: Can a person's eye color change as they age? 27 January 2010 23:51 UTC www.bookofjoe.com [Source type: General]

^ As stated above, although there has been much fuss about finding the genes for eye color, there is no simple genetic determinism for such a complex trait, as there is more to iris color than pigmentation.
  • Changing Your Eye Color - Iris Color Facts 27 January 2010 23:51 UTC www.healthguidance.org [Source type: FILTERED WITH BAYES]

^ Despite the wide range of colors, there is only one pigment that contributes substantially to normal human iris color, the dark pigment called melanin.
  • Changing Your Eye Color - Iris Color Facts 27 January 2010 23:51 UTC www.healthguidance.org [Source type: FILTERED WITH BAYES]

[1][2] .Humans and animals have many phenotypic variations in eye color, as blue, brown, green and others.^ My husbands eyes were an off color of green/grey/blue.
  • bookofjoe: BehindTheMedspeak: Can a person's eye color change as they age? 27 January 2010 23:51 UTC www.bookofjoe.com [Source type: General]

^ Recommended for blue eyes, green eyes and hazel eyes .

^ She usually lists her eye color as blue.
  • bookofjoe: BehindTheMedspeak: Can a person's eye color change as they age? 27 January 2010 23:51 UTC www.bookofjoe.com [Source type: General]

These variations constitute phenotypic traits.[3]
.The genetics of eye color are complicated, and eye color is determined by multiple genes.^ What determines eye color is the pigment melanin.
  • bookofjoe: BehindTheMedspeak: Can a person's eye color change as they age? 27 January 2010 23:51 UTC www.bookofjoe.com [Source type: General]

^ As stated above, although there has been much fuss about finding the genes for eye color, there is no simple genetic determinism for such a complex trait, as there is more to iris color than pigmentation.
  • Changing Your Eye Color - Iris Color Facts 27 January 2010 23:51 UTC www.healthguidance.org [Source type: FILTERED WITH BAYES]

^ Don't let the visible genes of coat pattern and eye color distract you from the much larger number of differences between cats from different breeds.

.Some of the eye-color genes include EYCL1 (a green/blue eye-color gene located on chromosome 19), EYCL2 (a brown eye-color gene) and EYCL3 (a brown/blue eye-color gene located on chromosome 15).^ I have blue eyes with a little green inside.
  • How To Match Eye Shadow With Your Eye Color 27 January 2010 23:51 UTC www.jurgita.com [Source type: General]

^ I have hazel eyes which can be brown, green, or tawny.
  • How To Match Eye Shadow With Your Eye Color 27 January 2010 23:51 UTC www.jurgita.com [Source type: General]

^ My eyes are blue, dh's are green.
  • Baby's Eye Color Predictor - Page 3 - Catholic Answers Forums 27 January 2010 23:51 UTC forums.catholic.com [Source type: FILTERED WITH BAYES]

.The once-held view that blue eye color is a simple recessive trait has been shown to be wrong.^ As stated above, although there has been much fuss about finding the genes for eye color, there is no simple genetic determinism for such a complex trait, as there is more to iris color than pigmentation.
  • Changing Your Eye Color - Iris Color Facts 27 January 2010 23:51 UTC www.healthguidance.org [Source type: FILTERED WITH BAYES]

^ Because of its recessive nature, this is a certainty if both parents have blue eyes.
  • Changing Your Eye Color - Iris Color Facts 27 January 2010 23:51 UTC www.healthguidance.org [Source type: FILTERED WITH BAYES]

^ For blue eyes and blond hair the best looking eyeshadow colors are browns and lavenders.

.The genetics of eye color are so complex that almost any parent-child combination of eye colors can occur.^ When a founder group breaks off from its parent population, such bsamplingQ may indeed increase the frequency of a variant hair- or eye -color allele.
  • European hair and eye color. A case of frequency-dependent sexual selection? - The Apricity Forum: Cultural & Ethnic European Preservation 27 January 2010 23:51 UTC www.theapricity.com [Source type: General]

^ As stated above, although there has been much fuss about finding the genes for eye color, there is no simple genetic determinism for such a complex trait, as there is more to iris color than pigmentation.
  • Changing Your Eye Color - Iris Color Facts 27 January 2010 23:51 UTC www.healthguidance.org [Source type: FILTERED WITH BAYES]

^ You almost couldn't call champagne-colored eyes "brown" since they're so pale.

[4][5]
.In human eyes, these variations in color are attributed to varying ratios of eumelanin produced by melanocytes in the iris.^ When a founder group breaks off from its parent population, such bsamplingQ may indeed increase the frequency of a variant hair- or eye -color allele.
  • European hair and eye color. A case of frequency-dependent sexual selection? - The Apricity Forum: Cultural & Ethnic European Preservation 27 January 2010 23:51 UTC www.theapricity.com [Source type: General]

^ Though this explanation gives an idea of eye color delineation, it is incomplete, and all the contributing factors towards eye color and its variation are not fully understood.
  • Changing Your Eye Color - Iris Color Facts 27 January 2010 23:51 UTC www.healthguidance.org [Source type: FILTERED WITH BAYES]

^ The eye is adapted to minimize the distorting effect that these color changes in the light have on the color appearance of objects.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

[2] .The brightly colored eyes of many bird species are largely determined by other pigments, such as pteridines, purines, and carotenoids.^ What determines eye color is the pigment melanin.
  • bookofjoe: BehindTheMedspeak: Can a person's eye color change as they age? 27 January 2010 23:51 UTC www.bookofjoe.com [Source type: General]

^ As stated above, although there has been much fuss about finding the genes for eye color, there is no simple genetic determinism for such a complex trait, as there is more to iris color than pigmentation.
  • Changing Your Eye Color - Iris Color Facts 27 January 2010 23:51 UTC www.healthguidance.org [Source type: FILTERED WITH BAYES]

^ But for many people the most intriguing feature of the human eye is simply its color.
  • bookofjoe: BehindTheMedspeak: Can a person's eye color change as they age? 27 January 2010 23:51 UTC www.bookofjoe.com [Source type: General]

[6]
.Three main elements within the iris contribute to its color: the melanin content of the iris pigment epithelium, the melanin content within the iris stroma, and the cellular density of the iris stroma.^ Iris color is a highly complex phenomenon consisting of the combined effects of texture, pigmentation, fibrous tissue and blood vessels within the iris stroma, which together make up an individual's epigenetic constitution.
  • Changing Your Eye Color - Iris Color Facts 27 January 2010 23:51 UTC www.healthguidance.org [Source type: FILTERED WITH BAYES]

^ Despite the wide range of colors, there is only one pigment that contributes substantially to normal human iris color, the dark pigment called melanin.
  • Changing Your Eye Color - Iris Color Facts 27 January 2010 23:51 UTC www.healthguidance.org [Source type: FILTERED WITH BAYES]

^ The degree of dispersion of the melanin, which is in subcellular bundles called melanosomes, has some influence on the observed color, but melanosomes in the iris of man and other vertebrates are not mobile, and the degree of pigment dispersion cannot be reversed.
  • Changing Your Eye Color - Iris Color Facts 27 January 2010 23:51 UTC www.healthguidance.org [Source type: FILTERED WITH BAYES]

[7] .In eyes of all colors, the iris pigment epithelium contains the black pigment, eumelanin.^ What determines eye color is the pigment melanin.
  • bookofjoe: BehindTheMedspeak: Can a person's eye color change as they age? 27 January 2010 23:51 UTC www.bookofjoe.com [Source type: General]

^ The colored part of the eye is called the iris.
  • The Human Eye, How We Perceive Color : Biology : Science Behind Colors : Colors 27 January 2010 23:51 UTC library.thinkquest.org [Source type: FILTERED WITH BAYES]

^ The lighter the pigment and the fewer the granules — the lighter the iris color and the lighter the eye.
  • Why did my eye color change? - Yahoo!7 Answers 27 January 2010 23:51 UTC au.answers.yahoo.com [Source type: General]

[2][7] .Color variations among different irises are typically attributed to the melanin content within the iris stroma.^ The main reason for difference in the eye colors of individuals is the melanin content within the iris stroma.
  • Types of Eye Colors - Most Common & the Rarest Eye Color 27 January 2010 23:51 UTC lifestyle.iloveindia.com [Source type: FILTERED WITH BAYES]

^ The reason behind this eye color is low amounts of melanin within the iris stroma.
  • Types of Eye Colors - Most Common & the Rarest Eye Color 27 January 2010 23:51 UTC lifestyle.iloveindia.com [Source type: FILTERED WITH BAYES]

^ Heterochromia (also known as a heterochromia iridis or heterochromia iridium) is an ocular condition in which one iris is a different color from the other iris (complete heterochromia), or where the part of one iris is a different color from the remainder (partial heterochromia or sectoral heterochromia).
  • Changing Your Eye Color - Iris Color Facts 27 January 2010 23:51 UTC www.healthguidance.org [Source type: FILTERED WITH BAYES]

[7] .The density of cells within the stroma affects how much light is absorbed by the underlying pigment epithelium.^ Rhodopsin is the light-absorbing pigment of the rods.
  • Vision 27 January 2010 23:51 UTC users.rcn.com [Source type: FILTERED WITH BAYES]

^ This is because the white light entering our eyes gets scattered and absorbed by cells in the eye, reflecting only blue light back through the irises.
  • What Does Your Eye Color Mean? by Robert Braders 27 January 2010 23:51 UTC www.opti-free.com [Source type: General]

^ In this context, three elements are mainly considered, namely the melanin content of the iris pigment epithelium, the melanin content within the iris stroma and the cellular density of the iris stroma.
  • Types of Eye Colors - Most Common & the Rarest Eye Color 27 January 2010 23:51 UTC lifestyle.iloveindia.com [Source type: FILTERED WITH BAYES]

[7] .OCA2 gene polymorphism, close to proximal 5′ regulatory region, explains most human eye-color variation.^ When a founder group breaks off from its parent population, such bsamplingQ may indeed increase the frequency of a variant hair- or eye -color allele.
  • European hair and eye color. A case of frequency-dependent sexual selection? - The Apricity Forum: Cultural & Ethnic European Preservation 27 January 2010 23:51 UTC www.theapricity.com [Source type: General]

^ My eyes are green but I have a lighter brown/green color around pupil it is actually a light green just up close can appear a little brown.
  • What color eyeshadow should I wear with my eye color? 27 January 2010 23:51 UTC www.temptalia.com [Source type: General]

^ But it is possible for eye color to vary from what is the standard for the particular coat pattern.

[8]

Contents

Genetic determination of eye color

.Eye colors can range from the most common color, brown, to the least common, green.^ My eyes are green but I have a lighter brown/green color around pupil it is actually a light green just up close can appear a little brown.
  • What color eyeshadow should I wear with my eye color? 27 January 2010 23:51 UTC www.temptalia.com [Source type: General]

^ I was going to add that, with terrytao's version, if a brown is able to deduce his eye color, he's going to kill himself.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ For blue eyes and blond hair the best looking eyeshadow colors are browns and lavenders.

.Eye color is an inherited trait influenced by more than one gene.^ As stated above, although there has been much fuss about finding the genes for eye color, there is no simple genetic determinism for such a complex trait, as there is more to iris color than pigmentation.
  • Changing Your Eye Color - Iris Color Facts 27 January 2010 23:51 UTC www.healthguidance.org [Source type: FILTERED WITH BAYES]

^ It would've also been more helpful if you had it divided into eye color and skin tone because some colors like absolutey horrible with different skin tones.
  • How To Match Eye Shadow With Your Eye Color 27 January 2010 23:51 UTC www.jurgita.com [Source type: General]

^ There are more than one blue eyed guys on this island.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

[9][10] These genes are being sought using associations to small changes in the genes themselves and in neighboring genes. These changes are known as single nucleotide polymorphisms or SNPs. .The actual number of genes that contribute to eye color is currently unknown, but there are a few likely candidates.^ So if there are actually six, how is their eye color revealed to them?
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ AM on February 15, 2008 The islanders do not know their own eye colors, but do they know that there are only two choices, i.e.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ AM on February 15, 2008 But the problem states that there are all different kinds of eye colors, it just so happens that this island only has blue and brown.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

.A study in Rotterdam (2009) found that it was possible to predict the color of eyes with more than 90% accuracy for brown and blue, using just six SNPs (from six genes).^ To emphasize blue eyes use brown and rose shadows.

^ For example: blue is the opposite of brown, for brown eyes use blue eyeshadow.
  • How To Match Eye Shadow With Your Eye Color 27 January 2010 23:51 UTC www.jurgita.com [Source type: General]

^ If you have blue eyes and want to accentuate them, use deep brown colors.

[11]
.The gene OCA2 (OMIM: 203200), when in a variant form, causes the pink eye color and hypopigmentation common in human albinism.^ So long as it has not been made common knowledge that there is at least one blue-eyed person on the island, this chain of reasoning prevents any person from determining their eye color.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ Though this explanation gives an idea of eye color delineation, it is incomplete, and all the contributing factors towards eye color and its variation are not fully understood.
  • Changing Your Eye Color - Iris Color Facts 27 January 2010 23:51 UTC www.healthguidance.org [Source type: FILTERED WITH BAYES]

^ But it is possible for eye color to vary from what is the standard for the particular coat pattern.

.(The name of the gene is derived from the disorder it causes, oculocutaneous albinism type II.) Different SNPs within OCA2 are strongly associated with blue and green eyes as well as variations in freckling, mole counts, hair and skin tone.^ I have blue eyes with a little green inside.
  • How To Match Eye Shadow With Your Eye Color 27 January 2010 23:51 UTC www.jurgita.com [Source type: General]

^ Recommended for blue eyes, green eyes and hazel eyes .

^ Eyeshadow for blue eyes and blonde hair.

.The polymorphisms may be in an OCA2 regulatory sequence, where they may influence the expression of the gene product, which in turn affects pigmentation.^ Because hidden genes affect the color of the offspring they are of great interest to a breeder.

[8] .A specific mutation within the HERC2 gene, a gene that regulates OCA2 expression, is partly responsible for blue eyes.^ Originally Posted by CatholicSam I was pondering over this topic, specifically how is it that there are several people here with brown or green eyes when both parents are blue-eyed.
  • Baby's Eye Color Predictor - Page 3 - Catholic Answers Forums 27 January 2010 23:51 UTC forums.catholic.com [Source type: FILTERED WITH BAYES]

^ XMLicious at 3:39 AM on February 16, 2008 But if they know that the question “Do I have blue eyes?” is going to be answered at a specific time But it's not going to be answered at any time.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

[12] .Other genes implicated in eye color variation are: SLC24A4 [13] and TYR.^ Though this explanation gives an idea of eye color delineation, it is incomplete, and all the contributing factors towards eye color and its variation are not fully understood.
  • Changing Your Eye Color - Iris Color Facts 27 January 2010 23:51 UTC www.healthguidance.org [Source type: FILTERED WITH BAYES]

^ If they had the inclination to figure out what the color of everyone's eyes was they could just ask each other "Hey, what color are my eyes?"
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ AM on February 15, 2008 If eye color was such a taboo, wouldn't they avoid looking at each other's eyes?
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

[13]
.Blue eyes with a brown spot, green eyes and gray eyes are caused by an entirely different part of the genome.^ If blue eyes are not the result of blue eye pigment then what causes them?

^ I have blue eyes with a little green inside.
  • How To Match Eye Shadow With Your Eye Color 27 January 2010 23:51 UTC www.jurgita.com [Source type: General]

^ I have hazel eyes which can be brown, green, or tawny.
  • How To Match Eye Shadow With Your Eye Color 27 January 2010 23:51 UTC www.jurgita.com [Source type: General]

.As Eiberg said: "The SNP rs12913832 [of the Herc2 gene] is found to be associated with the brown and blue eye color, but this single DNA variation cannot explain all the brown eye color variation from dark brown over hazel to blue eyes with brown spots."^ Brown eye princess said, .
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

^ I have hazel eyes which can be brown, green, or tawny.
  • How To Match Eye Shadow With Your Eye Color 27 January 2010 23:51 UTC www.jurgita.com [Source type: General]

^ Closeup of a hazel eye color .
  • Hazel eyes Stock Photo Images. 1593 Hazel eyes royalty free images and photography available to buy from over 100 stock photo companies. 16 September 2009 23:36 UTC www.fotosearch.com [Source type: General]

Classification of colors

.Iris color can provide a large amount of information about an individual, and a classification of various colors may be useful in documenting pathological changes or determining how a person may respond to various ocular pharmaceuticals.^ How can color be used for tired eyes?

^ Heterochromia (also known as a heterochromia iridis or heterochromia iridium) is an ocular condition in which one iris is a different color from the other iris (complete heterochromia), or where the part of one iris is a different color from the remainder (partial heterochromia or sectoral heterochromia).
  • Changing Your Eye Color - Iris Color Facts 27 January 2010 23:51 UTC www.healthguidance.org [Source type: FILTERED WITH BAYES]

^ As stated above, although there has been much fuss about finding the genes for eye color, there is no simple genetic determinism for such a complex trait, as there is more to iris color than pigmentation.
  • Changing Your Eye Color - Iris Color Facts 27 January 2010 23:51 UTC www.healthguidance.org [Source type: FILTERED WITH BAYES]

[14] .Various classification systems have ranged from a basic light or dark description to detailed gradings employing photographic standards for comparison.^ This is why submariners and astronomers dark adapt under red light: it keeps the foveal cones functional (for detail vision) while dark adapting the rods.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

^ In other words, Gene 1 basically effects the hue of the pigment and Gene 2 effects the density or lightness/darkness of the hue of Gene 1.

^ This kind of visual system, which is common in lower vertebrates , codes light along a single luminosity dimension that can only distinguish light from dark.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

[14] .Others have attempted to set objective standards of color comparison.^ Comparison of Additive and Subtractive Primay Colors Secondary colors of one system serve as the primary colors for the other.
  • Color Mixing 27 January 2010 23:51 UTC www.d.umn.edu [Source type: FILTERED WITH BAYES]

^ The Eye-One color management and profiling system continues to set the standard, offering products for everyone from the newly converted color management newbie to the most experienced among us.
  • CHROMiX ColorGear.com 27 January 2010 23:51 UTC www.chromix.com [Source type: General]

^ The ColorChecker provides a totally non-subjective standard of comparison to help determine the true color balance of any color rendition system.
  • X-Rite Eye-One Color Management ATLEX.COM 27 January 2010 23:51 UTC www.atlex.com [Source type: General]

[15]
.As the perception of color depends on viewing conditions (e.g., the amount and kind of illumination, as well as the hue of the surrounding environment), so does the perception of eye color.^ Recommended for all eye colors this shade works well with Lemon yellow.

^ AM on February 15, 2008 But the problem states that there are all different kinds of eye colors, it just so happens that this island only has blue and brown.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ The rods strongly affect color perception under moderately low illumination by mixing with or tinting the color responses of the still active cones.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

[16]
.Eye colors range from the darkest shades of brown to the lightest tints of blue.^ At that same instant every brown-eye (who knows he's either a blue-eye or a brown eye) has been making the same calculation, but waiting for day 101, because he or she sees 100 blue eyes.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ No, they don't know the stats, but observation would tell all these people that: -- there are brown eyed people -- there are blue eyed people -- the observer has eyes and they're probably a color It's that last thing that's throwing me.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ I was going to add that, with terrytao's version, if a brown is able to deduce his eye color, he's going to kill himself.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

[9] To meet the need for standardized classification, at once simple yet detailed enough for research purposes, Seddon et al. developed a graded system based on the predominant iris color and the amount of brown or yellow pigment present.[17] .There are three pigment colors that determine, depending on their proportion, the outward appearance of the iris: brown, yellow, and blue.^ The browns know that there either have to be 2 blues or 3 blues.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ I don't see anyone other than B with blue eyes--even though I do see people with brown, blue , hazel, green, purple, yellow, and fuschia eyes--so the person with blue eyes that B sees must be me.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ There is a major difference between the gene that determines the coat pattern and the two that determine color.

.Green irises, for example, have blue and some yellow.^ Normally Points have blue eyes, Minks have aqua eyes, and solids have green to yellow/green eyes.

^ These channels are segregated into contrasting red/green and yellow/blue opponent contrasts .
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

^ Note - this color DOES contain FD&C dyes yellow #5 and blue #1 Willow Light pastel green with silver frosting.
  • Natural mineral based powder cosmetics and skincare. - Eye Colors 2 27 January 2010 23:51 UTC pureluxecosmetics.com [Source type: General]

Brown irises contain mostly brown. .Eye color in animals other than Homo sapiens are differently regulated.^ Even the eye color is different.

^ AM on February 15, 2008 But the problem states that there are all different kinds of eye colors, it just so happens that this island only has blue and brown.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ It would've also been more helpful if you had it divided into eye color and skin tone because some colors like absolutey horrible with different skin tones.
  • How To Match Eye Shadow With Your Eye Color 27 January 2010 23:51 UTC www.jurgita.com [Source type: General]

.For example, instead of blue as in humans, autosomal recessive eye color in the skink species: Corucia zebrata is black, and the autosomal dominant color is yellow-green.^ Normally Points have blue eyes, Minks have aqua eyes, and solids have green to yellow/green eyes.

^ These channels are segregated into contrasting red/green and yellow/blue opponent contrasts .
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

^ This is why emergency response vehicles are now painted a light yellow green instead of the traditional red — the yellow green is much easier to see, especially in dim light.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

[18]

Changes in eye color throughout life

.In European populations, children are most commonly born with unpigmented eyes.^ Most babies are born with blue eyes.
  • Baby's Eye Color Predictor - Page 3 - Catholic Answers Forums 27 January 2010 23:51 UTC forums.catholic.com [Source type: FILTERED WITH BAYES]

^ Originally Posted by Goth_Catholic Most babies are born with blue eyes.
  • Baby's Eye Color Predictor - Page 3 - Catholic Answers Forums 27 January 2010 23:51 UTC forums.catholic.com [Source type: FILTERED WITH BAYES]

.As the child develops, melanocytes—cells found within the iris of human eyes (as well as skin and hair follicles)—slowly begin to produce melanin.^ I have Brown hair..my skin color is medium...not white and not too dark...What eye shadow would match me?
  • How To Match Eye Shadow With Your Eye Color 27 January 2010 23:51 UTC www.jurgita.com [Source type: General]

^ All the scientific details can be found at New Color Iris, but basically this thing is a disk that is surgically implanted into your eye.
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

^ He also said that once I get them out there is no guaranty that my eye will begin to produce these cells again as some people can repair this layer and some not… .
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

.Because melanocyte cells continually produce pigment, eye color, in theory, can be changed.^ Change eye color, 3 easy steps .
  • stock.xchng - omar_franc's blog - Change eye color, 3 easy steps 27 January 2010 23:51 UTC www.sxc.hu [Source type: FILTERED WITH BAYES]

^ It would've also been more helpful if you had it divided into eye color and skin tone because some colors like absolutey horrible with different skin tones.
  • How To Match Eye Shadow With Your Eye Color 27 January 2010 23:51 UTC www.jurgita.com [Source type: General]

^ Nov 2, 2006 6:25 AM I've been changing eye color for a while now, but I'd never done it this way.
  • stock.xchng - omar_franc's blog - Change eye color, 3 easy steps 27 January 2010 23:51 UTC www.sxc.hu [Source type: FILTERED WITH BAYES]

.Changes (lightening or darkening) of eye colors during puberty, early childhood, pregnancy, and sometimes after serious trauma (like heterochromia) do represent cause for plausible argument to state that some eyes can or do change, based on chemical reactions and hormonal changes within the body.^ Change your Eye Color Forever?
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

^ Recommended for all eye colors as a base also .

^ I have blue eyes that sometimes change to green.
  • How To Match Eye Shadow With Your Eye Color 27 January 2010 23:51 UTC www.jurgita.com [Source type: General]

.Most eye changes happen when the infant is around one year old, although it can happen up to three years of age.^ Day one rolls around and everyone on the island can see at least see at LEAST three blueys.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ I was born with blue eyes, but they've been a very pretty green since I was 7 years old.
  • Baby's Eye Color Predictor - Page 3 - Catholic Answers Forums 27 January 2010 23:51 UTC forums.catholic.com [Source type: FILTERED WITH BAYES]

^ And that since each person in the blue eye set thinks there's one FEWER than the set, and believes that each person in their n-1 set believes that there's n-2 in the set, then if you start with five, you still wind up with each person assuming that everyone else thinks there's three.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

[19]
.Studies on Caucasian twins, both fraternal and identical, have shown that eye color over time can be subject to change, and major demelanization of the iris may also be genetically determined.^ Only the color names change - not the genetics.

^ Change eye color, 3 easy steps .
  • stock.xchng - omar_franc's blog - Change eye color, 3 easy steps 27 January 2010 23:51 UTC www.sxc.hu [Source type: FILTERED WITH BAYES]

^ Change your Eye Color Forever?
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

.Most eye-color changes have been observed or reported in the Caucasian population with hazel eyes.^ Hey I hae hazel eyes also, but they can turn a yellowish color, it's ugly i admitt lol.
  • How To Match Eye Shadow With Your Eye Color 27 January 2010 23:51 UTC www.jurgita.com [Source type: General]

^ The most accurate way to describe these color changes in natural light is by means of a spectral power distribution (SPD).
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

^ The eye is adapted to minimize the distorting effect that these color changes in the light have on the color appearance of objects.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

[20]

Eye color chart (Martin-Schultz scale)

Carleton Coon created this chart by the Martin-Schultz scale often used in physical anthropology.
  1. Light eyes
    Eyes light and light mixed are 16-12 in Martin scale.
    Light
    Gray, blue, green.
    Light-mixed
    1. Very light-mixed (blue with gray or green or green with gray)
    2. Light-mixed (light or very light-mixed with small admixture of brown pigment)
  2. Mixed eyes
    Mixed
    12-6 in Martin scale. Mixture of light eyes (blue, gray or green) with brown pigment when light and brown pigment are the same level.
  3. Dark eyes
    Dark-mixed
    6-4 in Martin scale. Brown with small admixture of light pigment.
    Dark
    4-1 in Martin scale. Brown (light brown and dark brown) and very dark brown (almost black).

Amber

Amber iris
Human Female with an Amber Iris
Human amber eyes displaying the yellow pigments.
.
Amber eyes are of a solid color and have a strong yellowish/golden and russet/coppery tint.
^ Most light eyes are not really blue, though their “owners” clain they are, and most green eyes are more “stubbornly declared to be green” by their owner than “actually green.” Whose eyes are really amber or golden?
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

^ When I think of changing my eye color, it never goes further than tinted prescription contact lenses.
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

.This might be due to the deposition of the yellow pigment called lipochrome in the iris (which is also found in green eyes).^ Normally Points have blue eyes, Minks have aqua eyes, and solids have green to yellow/green eyes.

^ All the scientific details can be found at New Color Iris, but basically this thing is a disk that is surgically implanted into your eye.
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

^ Due to the possibility of iris pigmentation from uveitis and from melanoma (cancer) it is important to have your vet check the eye periodically.
  • Eye Problems in Cats 27 January 2010 23:51 UTC www.vetinfo.com [Source type: Original source]

[21][22] .Amber eyes should not be confused with hazel eyes; although hazel eyes may contain specks of amber or gold, they usually tend to comprise many other colors, including green, brown and orange.^ And they've all counted each other's eye color?
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ Do they have any way of knowing, for example, that their own eyes are not green or hazel?
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ AM on February 15, 2008 The islanders do not know their own eye colors, but do they know that there are only two choices, i.e.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

.Also, hazel eyes may appear to shift in color and consist of flecks and ripples, while amber eyes are of a solid gold hue.^ Closeup of a hazel eye color .
  • Hazel eyes Stock Photo Images. 1593 Hazel eyes royalty free images and photography available to buy from over 100 stock photo companies. 16 September 2009 23:36 UTC www.fotosearch.com [Source type: General]

^ Hey I hae hazel eyes also, but they can turn a yellowish color, it's ugly i admitt lol.
  • How To Match Eye Shadow With Your Eye Color 27 January 2010 23:51 UTC www.jurgita.com [Source type: General]

^ We have selected for eye color ranging from green (least pigment) to yellow-green (more pigment) - unlike the gold in the Burmese.

.The eyes of some pigeons contain yellow fluorescing pigments known as pteridines.^ These alleles also act upon the cells in the eye to suppress some of the pigment we see.

^ We have selected for eye color ranging from green (least pigment) to yellow-green (more pigment) - unlike the gold in the Burmese.

^ There is enough variance in both the eye pigment and the strength of the effect of the albino series, so that some Tonkinese have eye color which is not consistent with their coat pattern.

[23] .The bright yellow eyes of the Great Horned Owl are thought to be due to the presence of the pteridine pigment xanthopterin within certain chromatophores (called xanthophores) located in the iris stroma.^ Due to the possibility of iris pigmentation from uveitis and from melanoma (cancer) it is important to have your vet check the eye periodically.
  • Eye Problems in Cats 27 January 2010 23:51 UTC www.vetinfo.com [Source type: Original source]

^ We have selected for eye color ranging from green (least pigment) to yellow-green (more pigment) - unlike the gold in the Burmese.

^ This is due to the effects of the heat sensitive alleles inhibiting eye pigment from developing.

[24] In humans, yellowish specks or patches are thought to be due to the pigment lipofuscin, also known as lipochrome.[25]

Blue

A blue iris
.Blue eyes contain low amounts of melanin within the iris stroma; longer wavelengths of light tend to be absorbed by the underlying iris pigment epithelium, and shorter wavelengths are reflected and undergo Rayleigh scattering.^ Hence the blue eyes are blue light not blue pigment.

^ If blue eyes are not the result of blue eye pigment then what causes them?

^ Alternating between equally bright "blue" and "orange" wavelengths ( A ), or between a dim "green" and proportionately bright "red" light ( D ), would not change the output of that solitary L cone.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

[7] The type of melanin present is eumelanin.[26] .The inheritance pattern followed by blue eyes is considered similar to that of a recessive trait (in general, eye color inheritance is considered a polygenic trait, meaning that it is controlled by the interactions of several genes, not just one).^ Each of the two color genes has one allele that is dominant and one that is recessive.

^ A knows the following about what B knows about what C knows about eyes: A: A knows B knows C knows the color of A's eyes.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ At least one person has blue eyes.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

[10] .In 2008, new research revealed that people with blue eyes have a single common ancestor.^ The Bellman at 8:34 AM on February 15, 2008 But there are 100 blue eyed people on the island and surely you've seen more than 1 blue eyed person.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ AM on February 15, 2008 But the problem states that there are all different kinds of eye colors, it just so happens that this island only has blue and brown.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ With 100 blue-eyed islanders, "Everyone knows that 99 at least one person has blue eyes" is new information to the blue-eyes.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

.Scientists tracked down a genetic mutation that leads to blue eyes.^ If k=2, then it goes down as you describe, both the first two men kill themselves two days after the speech, so the third man knows he doesn't have blue eyes.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ In my Bio class I learned that all baby's are born with blue eyes and the color changes as the baby's eyes are exposed to light, and due to genetics.
  • bookofjoe: BehindTheMedspeak: Can a person's eye color change as they age? 27 January 2010 23:51 UTC www.bookofjoe.com [Source type: General]

."Originally, we all had brown eyes," said Hans Eiberg from the Department of Cellular and Molecular Medicine at the University of Copenhagen.^ Brown eye princess said, .
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

^ AM on February 15, 2008 But the problem states that there are all different kinds of eye colors, it just so happens that this island only has blue and brown.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ Because A can see that B-Z are all blue eyed, and he knew that the assumption that each hypothetical islander made about having brown eyes was false.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

[27] .Eiberg and colleagues showed in a study published in Human Genetics that a mutation in the 86th intron of the HERC2 gene, which is hypothesized to interact with the OCA2 gene promoter, reduced expression of OCA2 with subsequent reduction in melanin production.^ Despite that, some studies show that human dichromats do see saturation differences, especially at the spectrum ends, but with only half the acuity of trichromats.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

[28] .The authors concluded that the mutation may have arisen in a single individual in the Near East or around the Black Sea region 6,000–10,000 years ago during the Neolithic revolution.^ A single photon at a cone's peak sensitivity has a visual impact equivalent to 10,000 or more photons at the "tails" or low sensitivity ends of the curve.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

[27][28][29] .Eiberg stated, "A genetic mutation affecting the OCA2 gene in our chromosomes resulted in the creation of a 'switch,' which literally 'turned off' the ability to produce brown eyes."^ AM on February 15, 2008 But the problem states that there are all different kinds of eye colors, it just so happens that this island only has blue and brown.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ My girl and i are going to get our eyes changed from brown to blue….the ending of March…but first we’re waiting to see if our girl made it alright.
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

^ It is a direct affect of one set of genes altering the physiology of cells created by another set of genes - not two sets of simple genes which are genetically linked.

.The genetic switch is located in the gene adjacent to OCA2 and rather than completely turning off the gene, the switch limits its action, which reduces the production of melanin in the iris.^ Although the Burmese call every color except Sable a dilute (as all three are lighter than Sable), genetically a Champagne does not have the dilute gene.

^ This is why we can see very faint stars or lights at night if we look to one side, rather than directly at, their location.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

.In effect, the turned-down switch diluted brown eyes to blue.^ Blue is recommended for brown eyes.
  • What color eyeshadow should I wear with my eye color? 27 January 2010 23:51 UTC www.temptalia.com [Source type: General]

^ At that same instant every brown-eye (who knows he's either a blue-eye or a brown eye) has been making the same calculation, but waiting for day 101, because he or she sees 100 blue eyes.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ And since 100 blue-eyes just offed themselves, there must be only brown-eyes left.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

.If the OCA2 gene had been completely shut down, our hair, pubes, eyes and skin would be melanin-less, a condition known as albinism.^ But you must have known I was not a great fool, you would have counted on it, so I can clearly not gouge out the eyes of the man in front of me.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

[27]
.Blue eyes are most common in Northern Europe and Central Europe and to a lesser degree in Southern Europe and southern Central Asia; Afghanistan is a notable example.^ Most light eyes are not really blue, though their “owners” clain they are, and most green eyes are more “stubbornly declared to be green” by their owner than “actually green.” Whose eyes are really amber or golden?
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

^ So long as it has not been made common knowledge that there is at least one blue-eyed person on the island, this chain of reasoning prevents any person from determining their eye color.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ In particular, for example, you're claiming that A knows that B knows that C sees at least three blue-eyes.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

[30] They are also found in parts of North Africa,[31] West Asia, and South Asia,[32] in particular the northern areas of India and Pakistan. It can rarely occur as far south as Sri Lanka.
Bright blue eye.png
.A 2002 study found that the prevalence of blue eye color among Caucasians in the United States to be 33.8 percent for those born from 1936 through 1951 compared with 57.4 percent for those born from 1899 through 1905.[10] Blue eyes have become increasingly rare among American children, with only one out of every six or 16.6%, which is 49.8 million out of 300 million (22.4% of white Americans) of the total United States population having blue eyes.^ So if A is the only one with blue eyes, he realizes it's him and has to kill himself.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ The traveler only states that ONE person is of ONE color.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ Those people with NO eye color.
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

[33][34] .The plunge in the past few decades has taken place at a remarkable rate.^ Within the past few decades, genetic identification of the specific opsin types expressed in individual photopigments has produced an increasingly accurate picture.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

.A century ago, 80 percent of people married within their ethnic group.^ However, prereceptoral filtering varies significantly across age or ethnic groups and across individuals within any group.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

.Blue eyes were routinely passed down, especially among people of Western and Northern European ancestry.^ No, they aren't TOLD there are 100 people with blue eyes and 1000 with brown, but they can see that there are 99 people with blue eyes and 1000 with brown or 100 blues and 999 browns if they have brown eyes.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ In reality (not his thought experiment) he absolutely knows that everyone on the island can see three people with blue eyes.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ There are a bunch of people, but only two that you know of - Edna and Luanne - have blue eyes.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

[33][34][35]
.The outer surface of the iris of a blue-eyed person is actually clear, lacking the outer layer of pigmentation that is found in brown eyes.^ At least one person has blue eyes.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ Who's that other person with blue eyes?
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ If he is blue-eyed, there are 101 blue-eyes.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

.Their color is caused by the inner layer of pigmentation and the semi-opaque fibrous tissues that lie between the two layers.^ There is a major difference between the gene that determines the coat pattern and the two that determine color.

^ All colors produced by the mixture of those two colors of light must lie along the mixing line.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

^ An inner segment between the cell body and outer segment continually produces new photopigment molecules and passes them into newly formed layers of the outer segment.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

[36]

Brown

Brown iris
Light brown iris
.Brown eyes are dominant in humans[37] and in many parts of the world, it is nearly the only iris color present.^ Is brown the only eye color anybody wants to “fix”?
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

^ AM on February 15, 2008 The islanders do not know their own eye colors, but do they know that there are only two choices, i.e.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ I was going to add that, with terrytao's version, if a brown is able to deduce his eye color, he's going to kill himself.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

[38] It is less common in countries around the Baltic Sea and in Scandinavia. .Dark pigment of brown eyes are most common in East Asia, Southeast Asia, Oceania, Africa, South America and the Middle East.^ I’m a mixed race of black and white with a dark brown eyes, which i never like, now i’m so happy with my new beautiful baby blue.
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

^ They both started with dark brown eyes.
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

^ As a result, our eyes are most sensitive to "yellow green" wavelengths around the middle of the spectrum: yellows and greens are the most luminous colors in a prism spectrum or rainbow.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

.Light-pigmented brown eyes are common in Europe, Northern India and some parts of the Middle East.^ Hence the blue eyes are blue light not blue pigment.

^ These alleles also act upon the cells in the eye to suppress some of the pigment we see.

^ The advantage of having reflective retinas is that light that hits the retina passes through the rods and cones (the part of the eye that allow vision to occur) first.
  • Eye Problems in Cats 27 January 2010 23:51 UTC www.vetinfo.com [Source type: Original source]

Light-pigmented brown eyes are sometimes referred as "honey eyes".
.In humans, brown eyes contain large amounts of melanin within the iris stroma, which serves to absorb light at both shorter and longer wavelengths.^ This produces a change in pupil area from about 3.5 mm 2 to 20 to 35 mm 2 , which provides an 87% to 95% reduction in the amount of light entering the eye.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

^ The first is that very different distributions of light wavelengths will be perceived as the same color, and this occurs among both chromatic ("colored") and achromatic ("white") color sensations.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

^ An electronic sensor measures the radiance within small sections of the visible spectrum, then weights each section by its luminous efficacy; the total across the spectrum matches to a good approximation the light's luminance or apparent brightness to the human eye when the light is viewed in isolation.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

.Brown eyes are the most common eye color, with over half of the world's population having them.^ When a founder group breaks off from its parent population, such bsamplingQ may indeed increase the frequency of a variant hair- or eye -color allele.
  • European hair and eye color. A case of frequency-dependent sexual selection? - The Apricity Forum: Cultural & Ethnic European Preservation 27 January 2010 23:51 UTC www.theapricity.com [Source type: General]

^ My eyes are green but I have a lighter brown/green color around pupil it is actually a light green just up close can appear a little brown.
  • What color eyeshadow should I wear with my eye color? 27 January 2010 23:51 UTC www.temptalia.com [Source type: General]

^ I can see hazel as most fitting, and relate to brown and green - so, for those whose eye color will change, do you think you could identify your predominant personality at a given moment and guess their color?
  • Blog : ***EYE COLOR AND PERSONALITY TRAITS*** 27 January 2010 23:51 UTC personals.nwsource.com [Source type: General]


Gray

A steel blue-gray iris
Gray iris under magnification, exhibiting small amounts of yellow
.Gray eyes have less melanin than blue eyes,[citation needed] even though they are considered a darker shade of blue (like blue-green).^ So A knows they have blue eyes.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ That must mean they have blue eyes.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ Normally Points have blue eyes, Minks have aqua eyes, and solids have green to yellow/green eyes.

Gray eyes are most common in European Russia, Sweden, Finland and the Baltic States[citation needed]. It can also be found to a lesser extent in parts of India[32]. .Under magnification, gray eyes exhibit small amounts of yellow and brown color in the iris.^ Eye color - Brown eyes .
  • Eye color: Encyclopedia II - Eye color - Colors 27 January 2010 23:51 UTC www.experiencefestival.com [Source type: FILTERED WITH BAYES]

^ Eye color depends on the amount and type of pigments in the iris of the eye.
  • What Is the Rarest Eye Color? | eHow.com 27 January 2010 23:51 UTC www.ehow.com [Source type: General]

^ Eye color - Brown eyes.
  • Eye color: Encyclopedia II - Eye color - Colors 27 January 2010 23:51 UTC www.experiencefestival.com [Source type: FILTERED WITH BAYES]

.Ultimately, there are at least two things that could determine gray eye color.^ No, it's not necessary that there only be two eye colors.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ If they think there could be at least a third eye color they live.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ AM on February 15, 2008 The islanders do not know their own eye colors, but do they know that there are only two choices, i.e.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

.The first is the amount of melanin made, and the second is the density of the proteins in the stroma.^ The key is to look first at the extremities for color and then second at the body for amount of contrast to those extremities to determine the coat pattern.

[39]
.A gray iris may indicate the presence of a uveitis.^ Uncommon in humans, it is often an indicator of ocular disease, such as chronic iritis or diffuse iris melanoma, but may also occur as a normal variant.
  • Changing your Eye Color: Iris Color Facts 27 January 2010 23:51 UTC www.articlesbase.com [Source type: General]

^ Gray eyes may indicate a subtle and sensitive person who is attuned to the unseen and whose flexibility puts them several steps ahead of the crowd.

.However, other visual signs make a uveitis obvious.^ However, there's nothing more "logical" about starting the suicide clock when the outsider makes his pronouncement than starting it at any other time.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ Eye-care professionals, including ophthalmologists (medical doctors specializing in diseases and surgery of the eye) and optometrists recommend that everyone with visual or other eye signs or symptoms have their eyes checked.
  • Eye Diseases Pictures Slideshow: Recognize These Common Eye Conditions on MedicineNet.com 27 January 2010 23:51 UTC www.medicinenet.com [Source type: FILTERED WITH BAYES]

.Gray iris color, as well as blue, are at increased risk of uveal melanoma.^ For example with RGB, you can choose RGB, R, G, or B. If you choose B you can increase or decrease the amount of blue in the iris.
  • stock.xchng - omar_franc's blog - Change eye color, 3 easy steps 27 January 2010 23:51 UTC www.sxc.hu [Source type: FILTERED WITH BAYES]

^ Dark color changes in the iris are not always due to melanoma but it is important to continue to watch carefully for changes in the iris, especially anything that appears to be an increase in thickness.
  • Eye Problems in Cats 27 January 2010 23:51 UTC www.vetinfo.com [Source type: Original source]

^ To really do this experiment well you also have to adjust the color intensities so that the cat couldn't be distinguishing shades of gray in black and white vision.
  • Eye Problems in Cats 27 January 2010 23:51 UTC www.vetinfo.com [Source type: Original source]

[40]
.Visually, gray eyes often tend to appear to change between the shades of blue, green and gray; this is because gray eyes are extremely light, as mentioned before.^ Hence the blue eyes are blue light not blue pigment.

^ At that same instant every brown-eye (who knows he's either a blue-eye or a brown eye) has been making the same calculation, but waiting for day 101, because he or she sees 100 blue eyes.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ Normally Points have blue eyes, Minks have aqua eyes, and solids have green to yellow/green eyes.

Green

A light green iris with small amounts of brown
Olive green eyes
.
Green eyes are the product of low to moderate amounts of melanin and probably represent the interaction of multiple variants within the OCA2 and other genes.
^ I don't see anyone other than B with blue eyes--even though I do see people with brown, blue , hazel, green, purple, yellow, and fuschia eyes--so the person with blue eyes that B sees must be me.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ When light shines in their eyes, the reflection is red, because you see the blood vessels in the retina instead of the green color that hides the blood vessels in other cats.
  • Eye Problems in Cats 27 January 2010 23:51 UTC www.vetinfo.com [Source type: Original source]

^ I don't see anyone other than B with blue eyes--even though I do see people with brown, blue, hazel, green, purple, yellow, and fuschia eyes--so the person with blue eyes that B sees must be me.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

.Green eyes are most common in Northern and Central Europe.^ My eyes are the most intense GREEN .
  • Blog : ***EYE COLOR AND PERSONALITY TRAITS*** 27 January 2010 23:51 UTC personals.nwsource.com [Source type: General]

^ My eyes are generally (or most often) hazel, but will drift from more brown to more green - but not rapidly (haha!
  • Blog : ***EYE COLOR AND PERSONALITY TRAITS*** 27 January 2010 23:51 UTC personals.nwsource.com [Source type: General]

^ Hi, I have a similiar situation to that of Nitha's family; I was born with blue eyes (I believe) but most frequently now my eyes are green.
  • bookofjoe: BehindTheMedspeak: Can a person's eye color change as they age? 27 January 2010 23:51 UTC www.bookofjoe.com [Source type: General]

[41][42] They can also be found in parts of South Asia[32], West Asia, and North Africa. .In Iceland, 89% of women and 87% of men have either blue or green eye color.^ At that same instant every brown-eye (who knows he's either a blue-eye or a brown eye) has been making the same calculation, but waiting for day 101, because he or she sees 100 blue eyes.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ Normally Points have blue eyes, Minks have aqua eyes, and solids have green to yellow/green eyes.

^ AM on February 15, 2008 But the problem states that there are all different kinds of eye colors, it just so happens that this island only has blue and brown.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

[43] .A study of Icelandic and Dutch adults found green eyes to be much more prevalent in women than in men.^ There are no more or less than either 99 or 100, because my own eyes tell me this.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ In reality, however, most humans have trouble dealing with numbers higher than 5, or 10, making the first argument much more practical, if logically incorrect.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ I don't see anyone other than B with blue eyes--even though I do see people with brown, blue , hazel, green, purple, yellow, and fuschia eyes--so the person with blue eyes that B sees must be me.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

.Among European Americans, green eyes are most common among those of Celtic and Germanic ancestry, about 16%.^ Most light eyes are not really blue, though their “owners” clain they are, and most green eyes are more “stubbornly declared to be green” by their owner than “actually green.” Whose eyes are really amber or golden?
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

^ Go there if you’re looking longingly at surgery on your eyes to “fix the color” so you’ll look more like those most celebrated for their BEAUTY. .
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

^ As a result, our eyes are most sensitive to "yellow green" wavelengths around the middle of the spectrum: yellows and greens are the most luminous colors in a prism spectrum or rainbow.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

[44]

Hazel

This iris shows a mixture of brown and green colors.
This hazel iris shows a mix of gray and golden brown
Hazel eyes are due to a combination of Rayleigh scattering and a moderate amount of melanin in the iris's anterior border layer.[7][25] .Hazel eyes often appear to shift in color from a light brown to a dark golden-green.^ I was going to add that, with terrytao's version, if a brown is able to deduce his eye color, he's going to kill himself.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ He may see brown and green and hazel and red and pink and white and plaid and polka-dotted eyes, but as long as he sees no other blue eyes, he'll know his eyes must be blue."
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ AM on February 15, 2008 But the problem states that there are all different kinds of eye colors, it just so happens that this island only has blue and brown.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

.A number of studies using three-point scales have assigned hazel to be the medium color between the lightest shade of blue and darkest shade of brown.^ AM on February 15, 2008 But the problem states that there are all different kinds of eye colors, it just so happens that this island only has blue and brown.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ This curve was based on early (up to 1924) sets of diverse 2° color matching functions weighted to reproduce, at the corresponding wavelengths, the apparent brightness of the three rgb primary lights used in the color matching studies.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

^ So, clearly no one in the tribe knows the exact number of blue or brown eyed people.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

.January 2010" style="white-space:nowrap;">[citation needed] Hazel mostly consists of brown and green.^ He may see brown and green and hazel and red and pink and white and plaid and polka-dotted eyes, but as long as he sees no other blue eyes, he'll know his eyes must be blue."
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ I don't see anyone other than B with blue eyes--even though I do see people with brown, blue , hazel, green, purple, yellow, and fuschia eyes--so the person with blue eyes that B sees must be me.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ I don't see anyone other than B with blue eyes--even though I do see people with brown, blue, hazel, green, purple, yellow, and fuschia eyes--so the person with blue eyes that B sees must be me.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

.The dominant color in the eye can either be green or light brown/gold.^ The eye is adapted to minimize the distorting effect that these color changes in the light have on the color appearance of objects.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

^ Note - this color DOES contain FD&C dyes yellow #5 and blue #1 Willow Light pastel green with silver frosting.
  • Natural mineral based powder cosmetics and skincare. - Eye Colors 2 27 January 2010 23:51 UTC pureluxecosmetics.com [Source type: General]

^ I had hopes in changing my eye color from brown to green and having the lower bags removed.
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

[45][46][47][48][49][50][51] .This can sometimes produce a multicolored iris, i.e., an eye that is light brown/amber near the pupil and charcoal or dark green on the outer part of the iris (and vice versa) when observed in sunlight.^ I’m a mixed race of black and white with a dark brown eyes, which i never like, now i’m so happy with my new beautiful baby blue.
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

^ Most light eyes are not really blue, though their “owners” clain they are, and most green eyes are more “stubbornly declared to be green” by their owner than “actually green.” Whose eyes are really amber or golden?
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

^ Hi, i have bluey/greeny/gray average boring eyes, and i want to get this done, to green or mainly blue eyes, but i dont want them to be too light.
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

Hazel is commonly found in Europe, the Middle East, the Americas, Central Asia, and parts of South Asia.
.Definitions of the eye color hazel vary: it is sometimes considered to be synonymous with light brown or gold, as in the color of a hazelnut shell.^ I was going to add that, with terrytao's version, if a brown is able to deduce his eye color, he's going to kill himself.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ AM on February 15, 2008 But the problem states that there are all different kinds of eye colors, it just so happens that this island only has blue and brown.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ The eye is adapted to minimize the distorting effect that these color changes in the light have on the color appearance of objects.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

[45][47][50][52]

Red

"Red" albino eyes
.The eyes of people with severe forms of albinism may appear red under certain lighting conditions owing to the extremely low quantities of melanin,[53] allowing the blood vessels to show through.^ Your vet will examine the eye and may perform several tests to determine what is going on.
  • Eye Problems in Cats 27 January 2010 23:51 UTC www.vetinfo.com [Source type: Original source]

^ For example, long wavelength or "red" light can, in the right setting, appear red, scarlet, crimson, pink, maroon, brown, gray or even black!
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

^ The diagrams above also show the CIE 1951 scotopic sensitivity function [denoted V' ( λ )] which describes human light sensitivity under dark adaptation at illuminances below 0.1 lux.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

.In addition, flash photography can sometimes cause a "red-eye effect", in which the very bright light from the flash reflects off the back of the eyeball, causing the iris to appear red in the photograph.^ The retina is also woven throughout with tiny blood vessels that nourish the continuously active retinal tissue and give it the red color we sometimes see staring back at us in flash photographs.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

^ The eye is adapted to minimize the distorting effect that these color changes in the light have on the color appearance of objects.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

^ Sometimes more systemic testing is necessary to rule out generalized conditions causing secondary effects in the eye.
  • Eye Problems in Cats 27 January 2010 23:51 UTC www.vetinfo.com [Source type: Original source]

[54]

Spectrum of eye color

Medical implications

.Those with lighter iris color have been found to have a higher prevalence of age-related macular degeneration (ARMD) than those with darker iris color;[49] lighter eye color is also associated with an increased risk of ARMD progression.^ Those people with NO eye color.
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

^ All the scientific details can be found at New Color Iris, but basically this thing is a disk that is surgically implanted into your eye.
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

^ Has anyone found info on the lasik surgery to change the eye color, please let me know!!!!
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

[55] .An increased risk of uveal melanoma has been found in those with blue, green or gray iris color.^ For example with RGB, you can choose RGB, R, G, or B. If you choose B you can increase or decrease the amount of blue in the iris.
  • stock.xchng - omar_franc's blog - Change eye color, 3 easy steps 27 January 2010 23:51 UTC www.sxc.hu [Source type: FILTERED WITH BAYES]

^ All the scientific details can be found at New Color Iris, but basically this thing is a disk that is surgically implanted into your eye.
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

^ Available in both blue and green, the results look fantastic, but I think I’ll be sticking with color contact lenses for the time being.
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

[40][43] .However a study in 2000 suggests that people with dark brown eyes are at increased risk of developing cataracts and therefore should protect their eyes from direct exposure to sunlight.^ No, they aren't TOLD there are 100 people with blue eyes and 1000 with brown, but they can see that there are 99 people with blue eyes and 1000 with brown or 100 blues and 999 browns if they have brown eyes.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ If the three people don't kill themselves on the third day, and EVERYONE ELSE on the island has brown eyes, and day four dawns, well...
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ I’m a mixed race of black and white with a dark brown eyes, which i never like, now i’m so happy with my new beautiful baby blue.
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

[56]
Eye color may also be symptomatic of disease. Aside from the iris, yellowing of the whites of the eyes is associated with jaundice and symptomatic of liver disease, including cirrhosis, hepatitis and malaria. .Yellowing of the whites of the eyes in people with darker pigmented skin is often due to melanin being present in the whites of the eyes.^ I don't see anyone other than B with blue eyes--even though I do see people with brown, blue , hazel, green, purple, yellow, and fuschia eyes--so the person with blue eyes that B sees must be me.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ I don't see anyone other than B with blue eyes--even though I do see people with brown, blue, hazel, green, purple, yellow, and fuschia eyes--so the person with blue eyes that B sees must be me.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

.However, any sudden changes in the color of the whites of the eyes should be addressed by a medical professional.^ Change eye color, 3 easy steps .
  • stock.xchng - omar_franc's blog - Change eye color, 3 easy steps 27 January 2010 23:51 UTC www.sxc.hu [Source type: FILTERED WITH BAYES]

^ Change your Eye Color Forever?
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

^ He learned about the NewColorIris procedure, an intraocular implant offered only in Panama, which can permanently change the color of his eyes.
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

Anomalous conditions

Aniridia

Aniridia is a congenital condition characterized by an extremely underdeveloped iris, which appears absent on superficial examination.[57]

Ocular albinism and eye color

.Normally, there is a thick layer of melanin on the back of the iris.^ Is there anything we can do to help her get her normal eyes back - until we can get her to the vet?
  • Eye Problems in Cats 27 January 2010 23:51 UTC www.vetinfo.com [Source type: Original source]

^ Despite the wide range of colors, there is only one pigment that contributes substantially to normal human iris color, the dark pigment called melanin.
  • Changing your Eye Color: Iris Color Facts 27 January 2010 23:51 UTC www.articlesbase.com [Source type: General]

^ The implants are dilating the pupil in a really really bad way and once I get them out there is also no guaranty that the pupil will go back to its normal state….
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

.Even people with the lightest blue eyes, with no melanin on the front of the iris at all, have dark brown coloration on the back of it, to prevent light from scattering around inside the eye.^ I have blue eyes with a little green inside.
  • How To Match Eye Shadow With Your Eye Color 27 January 2010 23:51 UTC www.jurgita.com [Source type: General]

^ By: john my eyes have went from a dark brown to a light brown in 4 days.

^ What determines eye color is the pigment melanin.
  • bookofjoe: BehindTheMedspeak: Can a person's eye color change as they age? 27 January 2010 23:51 UTC www.bookofjoe.com [Source type: General]

.In those with milder forms of albinism, the color of the irises is typically blue but can vary from blue to brown.^ They'll know, as they see the Blues commit suicide, that they're none of them Blue, and hence by our variation they know themselves all to be Browns.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ Even if all the blue-eyed people commit suicide, any observer in the tribe will not know their own eye color, even if they know that everyone else has brown eyes.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ AM on February 15, 2008 But the problem states that there are all different kinds of eye colors, it just so happens that this island only has blue and brown.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

.In severe forms of albinism, there is no pigment on the back of the iris, and light from inside the eye can pass through the iris to the front.^ At the back of the eye there is a layer of reflective pigment called the choroid layer.
  • Aussie Eye Color and Eyeshine 27 January 2010 23:51 UTC www.ashgi.org [Source type: Original source]

^ Eyes that have a lot of it in the connective tissue at the front of the iris, called the stroma, are darker, while those that have less tend to be lighter.
  • bookofjoe: BehindTheMedspeak: Can a person's eye color change as they age? 27 January 2010 23:51 UTC www.bookofjoe.com [Source type: General]

^ This can happen anywhere along the nerve's course and it courses from the brain down the neck, through the chest and back to the eye.
  • Eye Problems in Cats 27 January 2010 23:51 UTC www.vetinfo.com [Source type: Original source]

.In these cases, the only color seen is the red from the hemoglobin of the blood in the capillaries of the iris.^ A person with color blindness has trouble seeing red, green, blue, or mixtures of these colors.
  • Eye Diseases Pictures Slideshow: Recognize These Common Eye Conditions on MedicineNet.com 27 January 2010 23:51 UTC www.medicinenet.com [Source type: FILTERED WITH BAYES]

^ Here at Obsidianbookshelf.com, I've never actually seen this color of gray in human eyes because the white rays in a gray human iris tend to make gray eyes pale.

^ What these colors might translate to in the eyes of dilute (blue, red, etc.

.Such albinos have pink eyes, as do albino rabbits, mice, or any other animal with a total lack of melanin.^ AM on February 15, 2008 If eye color was such a taboo, wouldn't they avoid looking at each other's eyes?
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ Because I know that 4 knows all this, I know that 4 does not base his eye color on their suicides or lack thereof because he knows their lack of suicide will be based on seeing each other whether his eyes are blue or not.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

Transillumination defects can almost always be observed during an eye examination due to lack of iridial pigmentation.[58] .The ocular albino also lacks normal amounts of melanin in the retina as well, which allows more light than normal to reflect off the retina and out of the eye.^ The portion of the cat's eyes that reflects light is the retina, or more specifically, the tapetum of the retina.
  • Eye Problems in Cats 27 January 2010 23:51 UTC www.vetinfo.com [Source type: Original source]

^ A tan or almost cream shadow would also be a good choice, it will give a little more contrast than a normal brown and will still work well with your skin tone.

^ These are the primary colors of paints or pigments -- when you add pigments together, fewer wavelengths of light are reflected to the eye, and if you mix them all you can get black.
  • Color Blindness - DrGreene.com 27 January 2010 23:51 UTC www.drgreene.com [Source type: General]

.Because of this, the pupillary reflex is much brighter in the albino, and this can increase the red eye effect in photographs.^ Because if B were the only BEI, he'd have killed himself pretty much right away...OMG, I must have blue eyes too!
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

Heterochromia

An example of complete heterochromia. .The subject has one brown eye and one hazel eye.^ Start with 2 blue eyed people, A and B. A thinks: If I am a brown eye, then B might think that there are no blue eyed people on the island (or just one) Or if I am a blue eye, then that guy thinks that there is at least one blue eyed person.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ However, highly logical people would recognize the implicit false dilemma between blue eyes and brown eyes and no one would kill themselves.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ It is one of those songs which seems to be ur life story and of course i have hazel eyes as well!
  • Behind These Hazel Eyes Lyrics - by KELLY CLARKSON from album BREAKAWAY : Lyrics And Songs 16 September 2009 23:36 UTC www.lyricsandsongs.com [Source type: FILTERED WITH BAYES]

The subject also appears to have a faint star pattern in the hazel iris.
An example of sectoral heterochromia. The subject has a blue iris with a brown section.
.Heterochromia (also known as a heterochromia iridis or heterochromia iridium) is an ocular condition in which one iris is a different color from the other iris (complete heterochromia), or where the part of one iris is a different color from the remainder (partial heterochromia or sectoral heterochromia).^ It’s a rare condition called heterochromia iridis read more .
  • Search Results: glamour.com 27 January 2010 23:51 UTC www.glamour.com [Source type: General]

^ As a natural part of the aging process, the human eye begins to perceive colors differently in later years, but does not become "colorblind" in the true sense of the term.
  • Molecular Expressions Microscopy Primer: Physics of Light and Color - Human Vision and Color Perception 27 January 2010 23:51 UTC micro.magnet.fsu.edu [Source type: FILTERED WITH BAYES]

^ Garden Botanika "Vineyard" eyeshadow trio ---Lovely , One color is a light violet, the other is a tanzanite ceylon blue sapphire color, the last is a white shimmer.
  • FOBB ~ The Eyes Have It ~ eyeshadow shades by eye color 27 January 2010 23:51 UTC www.thebroadroom.net [Source type: General]

.It is a result of the relative excess or lack of pigment within an iris or part of an iris, which may be inherited or acquired by disease or injury.^ All vertebrates have inherited visual pigments that evolved in fishes, which may explain why our pigments are tuned to these wavelengths.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

[59] This uncommon condition usually results due to uneven melanin content. A number of causes are responsible, including genetic, such as chimerism, Horners Syndrome and Waardenburg syndrome.
An example of sectoral heterochromia. A green eye with a brown section.
.A chimera can have two different colored eyes just like any two siblings can—because each cell has different eye color genes.^ AM on February 15, 2008 The islanders do not know their own eye colors, but do they know that there are only two choices, i.e.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ AM on February 15, 2008 But the problem states that there are all different kinds of eye colors, it just so happens that this island only has blue and brown.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ The newcoloriris thingy just seems like inserting a pair of single-colored freshlook lenses in your eyes….not entirely permanent…its still lenses.
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

.A mosaic can have two different colored eyes if the DNA difference happens to be in an eye color gene.^ AM on February 15, 2008 The islanders do not know their own eye colors, but do they know that there are only two choices, i.e.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ AM on February 15, 2008 But the problem states that there are all different kinds of eye colors, it just so happens that this island only has blue and brown.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ Browns have the same behavior as blues in terrytao; only the eye color differentiates the two groups.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

.There are many other possible reasons for having two different colored eyes.^ No, it's not necessary that there only be two eye colors.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ The eye is an attractive study for two reasons.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

^ AM on February 15, 2008 The islanders do not know their own eye colors, but do they know that there are only two choices, i.e.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

.For example, David Bowie's different eye colors comes from an injury that caused one pupil to be permanently dilated.^ AM on February 15, 2008 But the problem states that there are all different kinds of eye colors, it just so happens that this island only has blue and brown.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ So long as it has not been made common knowledge that there is at least one blue-eyed person on the island, this chain of reasoning prevents any person from determining their eye color.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ All the brownies are still alive because no one told the islanders there are only two eye colors.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

.Another idea about how this can happen is if an early viral infection while in the womb turns an eye color gene on or off in just one eye.^ A knows the following about what B knows about what C knows about eyes: A: A knows B knows C knows the color of A's eyes.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ A knows the following about what B knows about eyes: A: A knows B knows the color of A's eyes.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ BEI about his own eye color.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

Occasionally it can be a sign of a serious disease.
Green brown eyes.png
A common cause in females with heterochromia is X-inactivation, which can result in a number of heterochromatic traits, such as calico cats. .Trauma and certain medications, such as some prostaglandin analogues, can also cause increased or decreased pigmentation in one eye.^ One day, a stranger showed up on the island, and said some crap about blue eyes.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ But I never thought there would be permanent eye implants out there such as those provided by Kahn Medical Devices.
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

[60] .On occasion, the condition of having two different-colored eyes is caused by blood staining the iris after sustaining injury.^ AM on February 15, 2008 The islanders do not know their own eye colors, but do they know that there are only two choices, i.e.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ AM on February 15, 2008 But the problem states that there are all different kinds of eye colors, it just so happens that this island only has blue and brown.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ All the brownies are still alive because no one told the islanders there are only two eye colors.
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

Freckles

Greenbrowneye.jpg
.An eye freckle is a change in the pigment inside the eye, changing the eye color in a spot, similar to a freckle on the skin.^ Change your Eye Color Forever?
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

^ He learned about the NewColorIris procedure, an intraocular implant offered only in Panama, which can permanently change the color of his eyes.
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

^ The eye is adapted to minimize the distorting effect that these color changes in the light have on the color appearance of objects.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

.Eye freckles are usually harmless, although they should be watched for signs of growth or change, which would indicate a more serious condition.^ And as long as they haven't changed their minds, why should I? posted by tkolar at 1:10 PM on February 15, 2008 I wrote...
  • The island where eye color can kill you. | MetaFilter 27 January 2010 23:51 UTC www.metafilter.com [Source type: Original source]

^ Contacts that look more natural like your “real and/or true” eye color people would love.
  • FashionistaTV.com » Permanently Change Your Eye Color? 27 January 2010 23:51 UTC fashionistatv.com [Source type: General]

^ My eyecolor naturlly changes color, but would the colors that I should wear look good?
  • What color eyeshadow should I wear with my eye color? 27 January 2010 23:51 UTC www.temptalia.com [Source type: General]

.Pigment cells will get together into a cluster, forming a freckle.^ The cells of the pigment epithelium also break down the oldest layers of the outer segment as these grow into it.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

^ An inner segment between the cell body and outer segment continually produces new photopigment molecules and passes them into newly formed layers of the outer segment.
  • handprint : light and the eye 27 January 2010 23:51 UTC www.handprint.com [Source type: FILTERED WITH BAYES]

There is no known cause for this development. These freckles are called by the name choroidal nevi.

See also

References

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