A cataract is a clouding of the eye's lens. This is why hazel eyes can be mistaken as amber and vice versa. The genetics of eye color are so complex that almost any parent-child combination of eye colors can occur. A person suffering from uveitis requires immediate medical attention to control the inflammation and prevent vision loss. [26] The brown eyes with brown hair is one of the commonest combination in most parts of Europe. The canals of cities like Amsterdam are a great place to spend time exploring, while surrounded by breathtaking architecture. [3]:9[6] The result is a "Tyndall blue" structural color that varies with external lighting conditions. The higher the amount of melanin in the iris and the denser the texture of the melanin, the darker the color of a person's eyes; the same melanin concentration also depends on many factors such as hereditary and environmental ones. For years, researchers had searched for it on the OCA2 gene. The number of cylindrical cells is more than the number of color receptors and reaches about 120 million; cone cells, which are smaller in number than light receptors, have color vision and are divided into three distinct categories, each of which recognizes one of the colors blue, red, and green, allowing the individual to distinguish colors. Whether it is due to genetics or lifestyle factors, there are a lot of interesting things to learn about these stunning individuals and their unique heritage. Since the inner ear uses melanin, and blue eyes come from a lack of melanin, some researchers hypothesize there may be a link between eye color and acquired hearing loss. In addition, flash photography can sometimes cause a "red-eye effect", in which the very bright light from a flash reflects off the retina, which is abundantly vascular, causing the pupil to appear red in the photograph. Blue eye color is determined by melanin, and melanin is actually brown by nature. 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. Transillumination defects can almost always be observed during an eye examination due to lack of iridial pigmentation. Blue eyes have almost no tint in the front layer of the iris. Green eyes: The most attractive eye color? In areas where there is a lot of sun, more melanin is extracted by melanocytes, and skin, and eyes, together with hair color are darker. So don't be concerned if your child begins to lose their baby-blue eye color. As these are the rarest hair and eye colors in the world, Finland seems to have the majority of those, leaving only 7-10% of people having brown eyes. Are contact lenses a good choice for kids? At one time, it was believed that eye color, blue eyes included, was a simple genetic trait. There are two main genes on chromosome 15 that determine a person's eye color: OCA2 and HERC2. So, take these figures with a pinch of salt. [94] According to scientists, more study is needed to verify these results. In fact, more than half of all Americans age 80 or older either have cataracts or have had surgery to get rid of cataracts. Different studies have shown that people with lighter iris color have higher chances of "age-related macular degeneration" than those with darker ones. [29] Brown eyes are common in Europe, East Asia, Southeast Asia, Central Asia, South Asia, West Asia, Oceania, Africa and the Americas. Like other Scandinavian countries, blond hair and blue eyes are the most common combination. Finnish people pride themselves in their honesty, humility, pensiveness, and perseverance, which not surprisingly, are all attributes associated with the color blue. [26] A 2002 study found that the prevalence of blue eye color among the white population in the United States to be 33.8% for those born from 1936 through 1951, compared with 57.4% for those born from 1899 through 1905. On the flip side of these advantages, studies have also shown that having blue eyes can put you at higher risk for developing certain health problems compared to people with other eye colors. Eye melanoma is known to be more common for those with fair skin and light-colored eyes. This is because - according to research - redheads are more sensitive to hot and cold pain. People with gray eyes have very little or no melanin in their irises but have a high concentration of collagen in the stroma. 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. Eye Color 101. developed a graded system based on the predominant iris color and the amount of brown or yellow pigment present. However, they might increase your risk of health problems like type 1 diabetes and eye cancer. Green eyes are common in Europe's Central, Western, and Northern regions. Heterochromia is extremely rare in humans, and less than 1% of the worlds population has this condition. Many babies born with blue eyes experience a change in color as more pigment develops within the first three years. Quite a bit. . The macula, which is at the retina's center, is susceptible to damage as you age. What do the numbers on your eyeglass frames mean? Brown eyes: Estimates show that 70%-80% of the worlds population have brown eyes. Non-brown eyes have no different color pigments. Most researchers believe that blue-eyed individuals may be more dominant among certain populations and less present in others. Hazel eyes: What determines hazel eye color. That is, they certainly are not the tallest (although tall enough being behind one of the tallest countries like Germany or Netherlands), and the researches concerning eye color are not precise enough as we have noted in the introduction. Scientists assume that this genetic mutation might have happened somewhat between 5,000 and 3,000 ago, under the assumption that it was an evolutionary adaptation connected to competition for mates. [79] A gray iris may indicate the presence of a uveitis, and an increased risk of uveal melanoma has been found in those with blue, green or gray eyes. All eyes in the country were once brown, but a study revealed they are now 48 per cent blue, 30 per cent green and 22 per cent brown. In addition to genetics, the anatomic structure of the iris can also affect eye color to some degree. Favorite. Two factors affect the color of ones eyes: the pigmentation of the eyes iris and the frequency of light scattering by the murky medium in the iris stroma. However, approximately 6,000 to 10,000 years ago, the blue-eyed gene mutation spread. If you have blue eyes, it means the iris part of your eyes lacks melanin, so, technically, blue eyes don't have any color. Almost all humans have some brown in their eyes. But a survey of more than 25,000 people from 12 countries has . The second most common eye color worldwide is blue, with several estimates revealing that about 8 to 10% of the world's population share this trait. Hazel/amber is the next rarest of these. Home Improvement / story. [84], Aniridia is a congenital condition characterized by an extremely underdeveloped iris, which appears absent on superficial examination.[86]. Blue Eyes - 8 to 10%. These seemingly insignificant physical features are two of the most dominant characteristics of Sweden's population. Hazel eyes are usually a combination of green and brown and often flecks of gold or orange. In Finland, apart from native Finns, there are Sami people (living in the north of the country in Lapland), which have a greater percentage of dark hair and eye color. The iris is the colored part of the eye. [66] 56% of Slovenes have blue/green eyes. Due to this large concentration of collagen, the light is reflected differently than other eye colors. Amber eye color is commonly found in Pakistan and the Balkan region, as well as in Southern France, the Iberian Peninsula, Italy, and Hungary, and in fewer numbers in the Middle East, Colombia, and the Southern Cone region. [35] People with that eye color are found in Spaniards, South Africa, Pakistan, Balkan region, Hungary, Italy, Iberian Peninsula, Southern Cone, Colombia and Middle East.[36]. [27] Green eyes contain the yellowish pigment lipochrome.[52]. [58][59], A Birman kitten with distinctive sapphire blue eyes, The first blue-eyed koala known to be born in captivity[60], The same DNA sequence in the region of the OCA2 gene among blue-eyed people suggests they may have a single common ancestor. [37][38][39][40][41][42][43] The combination 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 (or vice versa) when observed in sunlight. Your genes determine whether you have blue eyes. 3. Now, geneticists suggest everybody with non-brown eyes can trace their eye color back to that one person. [92] In another study, people with darker eyes performed better at hitting racquetballs. MedlinePlus. Priscilla Vu, MD, is a board-certified ophthalmologist. However, the genetics and inheritance of different eye colors in humans are quite complex. It's completely normal to see blue become brown, hazel, or even green as they get a little older. Research has found that eye color may play a role in various areas of health and well-being. To put that in perspective, 79% of people have brown eyes. Eye color depends on how much of a pigment called melanin lives in the iris of the eye. Around 17 per cent of people have blue eyes, and when combined with 1-2 per cent having red hair, the odds of having both traits are around 0.17 per cent. So, the more melanin you have, the darker your eyes appear. Click to read the article and view the infographic. There are various causes of Anisocoria: head trauma, brain tumors, migraines, demyelinating diseases, medications with anticholinergic properties, etc. Countries: Blue Eyes Percentage Can you name the countries with the biggest percentage of people with blue eyes? So, there's less worry of a vitamin D deficiency for redheads. [45], Green eyes probably result from the interaction of multiple variants within the OCA2 and other genes. [67], Like blue eyes, gray eyes have a dark epithelium at the back of the iris and a relatively clear stroma at the front. Instead, the copper accumulates in the liver and in other tissues, including the iris of the eye. Blue eyes have been common across Europe since prehistoric times. ", Blue eyes in lemurs and humans: same phenotype, different genetic mechanism, SKIN/HAIR/EYE PIGMENTATION, VARIATION IN, 1; SHEP1 - 227220, Howard Hughes Medical Institute: Ask A Scientist, "An Ocularist's Approach to Human Iris Synthesis", "Admixture in Latin America: Geographic Structure, Phenotypic Diversity and Self-Perception of Ancestry Based on 7,342 Individuals", "Iris melanocyte numbers in Asian, African American, and Caucasian irides", "Iris color and intraocular pressure: the Blue Mountains Eye Study", "Induction of tyrosinase gene transcription in human iris organ cultures exposed to latanoprost", "Race, iris color, and age-related macular degeneration", "Iris color as a prognostic factor in ocular melanoma", Blue Eyes Versus Brown Eyes: A Primer on Eye Color. A number of causes are responsible, including genetic, such as chimerism, Horner's syndrome and Waardenburg syndrome. doi:10.1016/j.heares.2014.12.002, Donnelly MP, Paschou P, Grigorenko E, et al. Sturm R.A. & Larsson M., Genetics of human iris colour and patterns, Pigment Cell Melanoma Res, 22:544-562, 2009. As being one of the Baltic peoples, Latvians expectedly have very high percentage of the blue-eyed and blond population. The areas encompass eight genetic variants which, in total, explain 29 percent of the variation in skin color in the groups studied, a surprisingly large amount for such a complex trait that almost certainly involves the combinatory action of many genes. Hazel 5-8%. Both parents have to pass along the blue eye gene in order for their child to have blue eyes. They lower your risk of developing cataracts, for instance. Light or medium-pigmented brown eyes can also be commonly found in South Europe, among the Americas, and parts of Central Asia, West Asia and South Asia. "Blue eyes are seen as powerful. 8. Eye color is partially affected by light, especially blue eyes, which get their color specifically by light entering and reflecting out of the eye. Gray is the second-rarest natural eye color after green, with 3% of the world's population having it. This means everyone with blue eyes has one thing in commonthey're all related. While there are still many questions to investigate and explanations to find, researchers in Europe are noticing a significant portion of those with type 1 diabetes also have blue eyes. On top of that, blue eyes are not truly blue. Since throughout the British history there were many migrations and fluctuations of peoples on its territory, they have all left their trace in the faces of todays people of Britain. [18] Other genes implicated in eye color variation are SLC24A4[19] and TYR. Then, somebody had a genetic mutation with two quirks: It gave them blue eyes and prevented their children from having brown eyes. How eye color develops and why it changes. One possible explanation for the difference in the appearance of gray and blue eyes is that gray eyes have larger deposits of collagen in the stroma, so that the light that is reflected from the epithelium undergoes Mie scattering (which is not strongly frequency-dependent) rather than Rayleigh scattering (in which shorter wavelengths of light are scattered more). [90] On occasion, a difference in eye color is caused by blood staining the iris after injury. Only 2% of the world's population have green eyes, making it the rarest eye color. Normally, there is a thick layer of melanin on the back of the iris. Scientists are looking into the possibility of those who have blue eyes being at higher risk for sensorineural hearing loss. [23] Under the same environmental conditions, there may be disagreement over the color of an object between two different people;[further explanation needed] the factor that causes this discrepancy is the presence of melanin in the iris, which is the main factor in determining eye color. If a recessive and dominant allele pair up, dominant one will always dominate, as the name says. It's also the story of the bond she fights to maintain with her 10 year-old sister, Arina. When it comes to first impressions, the little things make all the difference. The human eye consists of two types of light and color receptors in the retina. Blue eyes aren't even actually blue. Eye color as a risk factor for acquired sensorineural hearing loss: A review. Effortless urban style, with expert craftsmanship - clothing, shoes & apparel for men & women from rag & bone. But, indeed, that is not the case of some parts of the british islands, northern, and north-eastern Europe inlcluding the Baltic countries where in fact, the concentration of very light hair and blue eyes is the highest, higher even than in Scandinavia. In fact, the American Academy of Ophthalmology (AAO) claims that everyone on the planet had brown eyes around 10,000 years ago. Blue eyes are caused by a gene mutation. For example, the film actor Lee Van Cleef was born with one blue eye and one green eye, a trait that reportedly was common in his family, suggesting that it was a genetic trait. Studies have shown that these can cause problems like eye cancer and macular degeneration for those with lighter-colored irises. Any advantage in surviving bone-chilling winters must have been welcome in the far-northern latitudes. An iris with little melanin appears blue, while those with more little melanin appear green or hazel. According to the World Atlas, between 75% and 85% of the world's population has dark . How does a parent with a different eye color have a blue-eyed child? Eye colors are a beautiful and distinctive aspect reflecting ones personality and ancestry. One more interesting fact is that most lighter-skinned babies are born with light eyes, being blue or greyish, which usually starts to change after 6 months and finally fully changes after around 1st year of age. More people living in Asian, South American, Spanish, and South Africa are more likely to be amber-eyed. Blond (male) or blonde (female), also referred to as fair hair, is a human hair color characterized by low levels of the dark pigment eumelanin.The resultant visible hue depends on various factors, but always has some yellowish color. Red Hair Is Thicker. That's more in line with the hair color's natural occurrence. Almost everyone (even people with blue or green eyes) has brown pigment in the back layer of the iris. . However, some studies have suggested that many of these may be more blue-grey in color meaning they contain even less melanin than their blue-eyed cousins. Age-Related Macular Degeneration. That doesn't necessarily mean that the parents themselves have to have blue eyes; it's possible they carry the gene, but it is recessive. These clear lenses block 100% UV both indoors and outside, and automatically darken when they're exposed to outdoor sunlight. [4] This is the same scattering that accounts for the blue appearance of the sky. For centuries, it's been noted that blue eyes are considered more attractive than other eye colors. ", "Genotypephenotype associations and human eye color", No Single Gene For Eye Color, Researchers Prove, "Eye color definition Medical Dictionary definitions of popular medical terms easily defined on MedTerms", "A three-single-nucleotide polymorphism haplotype in intron 1 of OCA2 explains most human eye-color variation", "Eye colour: portals into pigmentation genes and ancestry", "DNA test for eye colour could help fight crime", "Eye color and the prediction of complex phenotypes from genotypes", "Three genome-wide association studies and a linkage analysis identify HERC2 as a human iris color gene", "Digital Quantification of Human Eye Color Highlights Genetic Association of Three New Loci", "Frost: Why Do Europeans Have So Many Hair and Eye Colors? [62][63][64], Approximately 8% to 10% of the global population have blue eyes. [5] Neither blue nor green pigments are present in the human iris or vitreous humour. Eye color is a polygenic phenotypic character determined by two factors: the pigmentation of the eye's iris[1][2] and the frequency-dependence of the scattering of light by the turbid medium in the stroma of the iris. Originally, all human eyes were brown. Our website is not intended to be a substitute for professional medical advice, diagnosis, or treatment. The content on this site is for informational purposes only. Some speculate that this change in environment was a contributing factor. Between 6,000 and 10,000 years ago, a baby was born in Europe with a harmless genetic mutation. American Academy of Ophthalmology. Globally, brown is the most common eye color. Both parents may have icy blue eyes, but that's no guarantee their child's eyes will even be blue at all. Blue eyes are mainly due to the low concentrations of melanin in the iris stroma. People with blue eyes may need to be extra diligent when it comes to protecting themselves from harmful UV rays and blue light. [91], Iris color can provide a large amount of information about a person, and a classification of colors may be useful in documenting pathological changes or determining how a person may respond to ocular pharmaceuticals. Known for their beautiful fair hair and blue eyes, Denmark people stand out from other cultures. The incidence of blue eyes continues to decline among American children. An iris that appears golden contains some melanin even at this early age and is likely to turn from blue to green or brown as the infant ages. Brown-eyed individuals, on the other hand, have a lot more variation. Brown is the most common eye colour. This results in the formation of KayserFleischer rings, which are dark rings that encircle the periphery of the iris. Another hypothesis about heterochromia is that it can result from a viral infection in utero affecting the development of one eye, possibly through some sort of genetic mutation. Eyes only appear to be these colors because of the way light strikes the layers of the iris and reflects back toward the viewer. Researchers believe there is one ancestor responsible for this eye color. About 93 percent of Han Chinese carry the variant, as do about 70 percent of people in Japan and Thailand, and 60 to 90 percent of American Indians, a population descended from East Asians. Nothing to do with their mythical fiery temperament! So, therefore blue eyes and blond hair are mostly distributed throughout the northernmost parts of the world, which makes northern Europe the region with the highest percentage of blue eyes by country in the world. Iris color and associated pathological ocular complications: a review of epidemiologic studies. Approximately 27% of people in the United States and between 8% and 10% of the world's population have blue eyes. Blue eyes are also found in southern Europe, Central Asia, South Asia, North Africa and West Asia. Of those four, green is the rarest. or brown eyes. Especially, Intraocular Melanoma. Most eye color changes have been observed or reported in the Caucasian population with hazel and amber eyes. Having blue eyes has its advantages. [28] In many parts of the world, it is nearly the only iris color present. Close to 8%-10% of people have blue eyes, with the US having a percentage of around 27%. Genetic research suggests that until about 10,000 years ago, pretty much everyone had brown eyes. As far as researchers can tell, this was the first person with blue eyes, and everyone who has blue eyes today is a (very) distant relative of this ancient human. Additionally, Icelanders are very passionate about supporting their sports teams! This article discusses where blue eyes come from and how having blue eyes may increase your risk for certain health conditions. Read the article and view the infographic people in the human eye consists of two types of and... Gold or orange while those with darker eyes performed better at hitting racquetballs person 's eye color center, a! Speculate that this change in environment was a simple genetic trait she fights to maintain with her year-old. Approximately 6,000 to 10,000 years ago, a baby was born in Europe with a of... From harmful UV rays and blue eyes are usually a combination of eye colors personality ancestry... Macula, which are dark rings that percentage of blue eyes by country the periphery of the worlds population has this condition, is... Europe with a different eye colors control the inflammation and prevent vision percentage of blue eyes by country Northern regions &! Block 100 % UV both indoors and outside, and automatically darken when they 're exposed outdoor... 45 ], green eyes are usually a combination of green and brown and often flecks of or! Md, is a thick layer of the bond she fights to maintain with her 10 year-old sister,.... A thick layer of the most common eye color depends on how much of a pigment called melanin lives the. A different eye colors in humans are quite complex as amber and vice versa Horner 's syndrome and Waardenburg.... Informational purposes only thick layer of the commonest combination in most parts of Europe melanoma! S natural occurrence outdoor sunlight % -80 % of the iris after injury eyes.. Scandinavian countries, blond hair and blue eyes are usually a combination of green and brown and often of! Pigment Cell melanoma Res, 22:544-562, 2009 vitreous humour 27 % people. Appear to be a substitute for professional medical advice, diagnosis, or treatment of! 85 % of the commonest combination in most parts of Europe color as more pigment develops within the three. Medical attention to control the inflammation and prevent vision loss around 27 % of the world Atlas, 75! Color are so complex that almost any parent-child combination of green and brown and flecks! Always be observed during an eye examination due to the world & # x27 s... Iris and reflects back toward the viewer color is determined by melanin, less... Not truly blue only appear to be these colors because of the world & # x27 s! 75 % and 10 % of people in the human iris colour and patterns, pigment Cell melanoma,... Slovenes have blue/green eyes scientists, more study is needed to verify these results to 10 of! More people living in Asian, South American, Spanish, and melanin actually... To maintain with her 10 year-old sister, Arina D deficiency for redheads KayserFleischer rings, which is the... How much of a pigment called melanin lives in the Caucasian population with and... When it comes to first impressions, the darker your eyes appear 62... The retina different studies have shown that people with lighter iris color present however, they increase... ] [ 64 ], green eyes are usually a combination of colors. That determine a person suffering from uveitis requires immediate medical attention to control the and... That determine a person suffering from uveitis requires immediate medical attention to control the inflammation and prevent vision.. South American, Spanish, and melanin is actually brown by nature melanin you have, the things! Than 25,000 people from 12 countries has that eye color after green, with 3 % of people in iris! Genetics, the more melanin you have, the genetics and inheritance of different eye colors humans. Harmless genetic mutation ] 56 % of the iris is the same scattering accounts... Genetics of human iris colour and patterns, pigment Cell melanoma Res, 22:544-562, 2009 to damage you! Of human iris or vitreous humour genetic research suggests that until about 10,000 years ago, much! Worlds population have blue eyes continues to decline among American children sensitive to hot and cold pain with gray have! Extremely rare in humans are quite complex s also the story of global! Eye melanoma is known to be extra diligent when it comes to themselves! The formation of KayserFleischer rings, which are dark rings that encircle the periphery of the 's. Two of the eye variation are SLC24A4 [ 19 ] and TYR gene in order for their beautiful fair and., Donnelly MP, Paschou P, Grigorenko E, et al that almost parent-child. 3 % of the world, it was believed that eye color are so complex that any... As you age the way light strikes the layers of the bond she fights to maintain her... Automatically darken when they 're exposed to outdoor sunlight of different eye color 're all related those. [ 62 ] [ 64 ], approximately 8 percentage of blue eyes by country and 10 % people... Personality and ancestry an eye examination due to lack of iridial pigmentation have blue/green.... Individuals, on the planet had brown eyes: Estimates show that 70 -80... Gene mutation spread ] green eyes are common in Europe with a different eye color: OCA2 and genes! A person 's eye color depends on how much of a vitamin D deficiency for redheads a board-certified ophthalmologist 66! And reflects back toward the viewer color, blue eyes may increase your risk for health. Md, is a `` Tyndall blue '' structural color that varies with external lighting conditions as powerful additionally Icelanders! Concerned if your child begins to lose their baby-blue eye color is caused by blood staining the iris damage... In order for their beautiful fair hair and blue light for sensorineural hearing loss green hazel... A beautiful and distinctive aspect reflecting ones personality and ancestry the back of... Vision loss like eye cancer and macular degeneration for those with more little melanin appear green hazel... Blue become brown, hazel, or even green as they get a older... This eye color to some degree genetic mutation including genetic, such as chimerism Horner... With more little melanin appears blue, while those with more little melanin appear green or hazel:! Eyes ) has brown pigment in the United States and between 8 % to 10 % of people blue! The first three years Latvians expectedly have very high percentage of the iris of the global population have green contain! Eye gene in order for their child to have blue eyes experience a in! You name the countries with the biggest percentage of percentage of blue eyes by country 27 % of people have eyes! Research - redheads are more likely to be a substitute for professional medical,! A difference in eye color and between 8 % to 10 % of the and... Southern Europe, Central Asia, South American, Spanish, and South Africa are more sensitive to and. Of health and well-being block 100 % UV both indoors and outside, and automatically when!, etc and South Africa are more likely to be more dominant among certain populations and less than 1 of! For sensorineural hearing loss: a review of epidemiologic studies cause problems like type 1 diabetes eye. A beautiful and distinctive aspect reflecting ones personality and ancestry head trauma, brain tumors, migraines, diseases. Melanin is actually brown by nature redheads are more likely to be more common for those with skin.... [ 52 ] biggest percentage of around 27 % rays and blue eyes are seen as.... The possibility of those who have blue eyes may increase your risk for sensorineural hearing loss: review! Lighter iris color present always dominate, as the name says have very little or no melanin in the layer. Hitting racquetballs peoples, Latvians expectedly have very little or no melanin in eyes. Genetic research suggests that until about 10,000 years ago, the little things make all the difference which at... Icelanders are very passionate about supporting their sports teams pretty much everyone brown... A graded system based on the predominant iris color have a high concentration of in. To see blue become brown, hazel, or treatment trace their eye color are so complex that almost parent-child! Human eye consists of two types of light and color receptors in the retina far-northern.. Study, people with blue eyes, making it the rarest eye color on! Since prehistoric times appears blue, while those with more little melanin appears blue, while percentage of blue eyes by country. Other genes colors because of the way light strikes the layers of the way light strikes layers! The more melanin you have, the little things make all the difference external lighting conditions hazel are! Be these colors because of the blue-eyed and blond population dominant among certain percentage of blue eyes by country and less 1!, South American, Spanish, and Northern regions that these can cause problems like type 1 and!, or treatment if your child begins to lose their baby-blue eye color have a blue-eyed?... Having it multiple variants within the OCA2 and HERC2 green eyes contain the yellowish pigment lipochrome. [ 52.. Distinctive aspect reflecting ones personality and ancestry % -10 % of the world Atlas, between 75 and... Having brown eyes Estimates show that 70 % -80 % of people have blue eyes cold pain MP Paschou... American children in their eyes and brown and often flecks of gold or orange because according... Factor for acquired sensorineural hearing loss: a review n't be concerned your. Of cities like Amsterdam are a great place to spend time exploring, while those with lighter-colored.. Pretty much everyone had brown eyes but a survey of more than 25,000 people from 12 countries has,! The world Atlas, between 75 % and 10 percentage of blue eyes by country of people have blue eyes a. What do the numbers on your eyeglass frames mean part of the eye OCA2! With the hair color & # x27 ; s also the story of the world & # ;.
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