Taro Aso, Japan's foreign minister, risked upsetting his country's strongest ally by suggesting US diplomats in the Middle East would never solve the region's problems because they have 'blue eyes . So, the more melanin you have, the darker your eyes appear. 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. The inheritance pattern followed by blue eyes was previously assumed to be a mendelian recessive trait, however, eye color inheritance is now recognized as a polygenic trait, meaning that it is controlled by the interactions of several genes. The scale consists of 20 colors[97] ranging from light blue to dark brown-black, corresponding to natural eye colors caused by the amount of melanin in the iris:[98][99]. 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. In Norway, an estimated 75% of the population . Blue eyes actually didn't exist 10,000 years ago. A small numer of people have eyes of an even rarer color, such as violet or red, or display heterochromia, a condition in which a person's eyes are two different colors. If you have a darker iris color, you are at a greater risk of developing this eye disease. 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. Brown is the dominant eye color across vast swaths of Africa and Asia, for instance, but the hues lighten in Europe, where the eyes get bluer as the weather gets colder. [7] Humans and other animals have many phenotypic variations in eye color. MDQL won't back down. A study in Rotterdam (2009) found that it was possible to predict eye color with more than 90% accuracy for brown and blue using just six SNPs. Less melanin, the eyes are blue. Thats true for people of every eye color. A persons eye color can reveal the underlying health issues that person might be suffering. [87] 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. Most people have brown tint in the back layer, but lighter eyes have less tint in the front layer. Blue eyes are a distant second, followed by hazel eyes, green eyes, then other. This last category includes amber eyes, gray eyes and even violet eyes. And when you meet a red head with blue eyes, you are looking at the rarest colour combination of all for human beings. Just 2.2 percent of male CEOs had blond hair, a 2005 study found. Without question, brown eyes dominate globally, with an estimated 70-79% of the worlds population having eyes in shades of brown ranging from light golden brown to very dark brown and everything in between. or brown eyes. [95] Classification systems have ranged from a basic light or dark description to detailed gradings employing photographic standards for comparison. The mutation occurred between . Ready? Like other Scandinavian countries, blond hair and blue eyes are the most common combination. Blue eyes are mainly due to the low concentrations of melanin in the iris stroma. [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. 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. Common Eye Disorders. Eyeglass temples: How do you know if they're the right length? [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. Almost all humans have some brown in their eyes. The extensive study on the genetic mutation was carried out by researchers at three Japanese universities; the research concluded that the genetic mutation occurred around 9,000 BC, as a result of various environmental and evolutionary factors. Blue light may also damage your retinas. A cataract is a clouding of the eye's lens. Globally, only about eight to 10 percent of people have this eye color with Europe containing the large majority. In theory, blue eyes may have protected a person from acquiring vision disorders caused by these periods. While it's a very rare type of cancer, people with blue eyes are at higher risk of developing ocular uveal melanoma. Instead, they have less melanin, absorb less light, scatter more light and reflect it along the spectrum of light color. The gray-eyed have little or no melanin in their iris but have more collagen in the stroma part of the eye. Blue eyes may have developed due to an evolutionary response to the dark winters prevalent in Northern Europe. 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. Some of the eye-color genes include OCA2 and HERC2. That's right this small European country is also the birthplace of many people with striking blue eyes and fair complexions. A person may also have more than one eye color, a condition called Heretochromia, which affects less than 1% of people. Melanin is also responsible for the color of our skin, eyes and hair. How older drivers can improve their driving at night, trace their eye color back to that one person, population of people with lighter eyes, hair and skin, Eye exams: 5 reasons why they are important, 5 Things you might not know about blue eyes. Gray eyes can also be found among the Algerian Shawia people[69] of the Aurs Mountains in Northwest Africa, in the Middle East/West Asia, Central Asia, and South Asia. In other words, it's impossible to know for sure if your children will have blue eyes or any other color. Known for their beautiful, pale blue eyes and milky-white skin, Swedes stand out wherever they go. Iris color and associated pathological ocular complications: a review of epidemiologic studies. For years, researchers had searched for it on the OCA2 gene. In fact, the iris (the colored part of the eye) has two layers, both of which have brown tint in them. Light traveling through the iris gets dispersed in a way that gives blue eyes their distinct color. Eye color is partially affected by light, especially blue eyes, which get their color specifically by light entering and reflecting out of the eye. Some medical conditions affect ones eye color. Yahoo CEO Marissa Mayer -- 48 percent of female CEOs on the S&P 500 sport blonde locks. The cultural implications are another story. 2023 Dotdash Media, Inc. All rights reserved, Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Only about 8 % to 10% of the world's population has blue eyes. Amber eyes have a little more melanin than hazel eyes, and still account for approximately 5% of the population. There is no blue pigmentation either in the iris or in the vitreous body. However, they might increase your risk of health problems like type 1 diabetes and eye cancer. In addition, OCA2 and HERC2 are the two major genes associated with the variation in eye colors. Which country has the most people with blue eyes? Now, lets get back to our main questions, which country has the most blue eyes and which country has the most blondes. Researchers believe there is one ancestor responsible for blue eyes that descended from the Black Sea region of southeastern Europe anywhere between 6,000 to 10,000 years ago. For blue-eyed people, this top layer lacks melanin. [3][6] This is an example of structural color, which depends on the lighting conditions, especially for lighter-colored eyes. For the shade of purple, see, "Brown eyes" redirects here. While blue eyes may be rare, they're among the most common eye colors at birth. Why Do Europeans Have So Many Hair and Eye Colors? [37][39][42][44], Around 18% of the US population and 5% of the world population have hazel eyes. 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. Hazel eyes are usually a combination of green and brown and often flecks of gold or orange. Both parents may have icy blue eyes, but that's no guarantee their child's eyes will even be blue at all. An iris with little melanin appears blue, while those with more little melanin appear green or hazel. So if you ever wondered why and how rare is blonde hairand blue eyes, you got a part of the answer here. Comments. But all in all, there hasnt been any comparative research done, or even within the individual countries of the real state of blue-eyed blond populations. Now, lets see what else we have on our list oftop countries that have the most blondes and blue eyes as a percentage ofpopulation. The Netherlands is one of the most interesting countries in the world, with a fascinating history and culture that sets it apart from many others. Blue-eyed, fair-skinned settlers inhabited the Levant some 6,500 years ago, according to an international interdisciplinary team of scientists. The collagen is scatted by light to make the eyes look gray. Send a Message. Gray eyes are common in parts of Central Asia, South Asia, the Middle East, and among the Algerian Shawia people in Northwest Africa. MedlinePlus. 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. 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. (An estimated 55 percent of all people . 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. Approximately 27% of people in the United States and between 8% and 10% of the world's population have blue eyes. Even though the top countries that have the most blondes and blue eyes as a percentage of population are the European ones, some interesting scientific research have shown that evolution of blondes has probably happened more than once throughout the history of humankind. Viking stereotypes for being tall, strong, blond and blue-eyed are confirmed at least for the last two matters in the case of Denmark. [17], There is evidence that as many as 16 different genes could be responsible for eye color in humans; however, the main two genes associated with eye color variation are OCA2 and HERC2, and both are localized in Chromosome 15. Research has found that eye color may play a role in various areas of health and well-being. Moreover, a gray iris may indicate uveitis, while those with blue, green, or gray eyes are at an increased risk of uveal melanoma. Blue-eyed humans have a single, common ancestor. "Originally, we all had brown eyes" said Eiberg. About half as many Americans have blue eyes as brown eyes. Having blue eyes has its advantages. And around 10%, 5%, and 2% . Provincia: bulletin trimestriel de la Socit de Statistique http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A1999.01.0133%3Abook%3D1%3Acard%3D206, "Melanins: Skin Pigments and Much MoreTypes, Structural Models, Biological Functions, and Formation Routes", "The Claim: Eye Color Can Have an Effect on Vision", Quantification and Correction of Iris Color. In European countries, blue eyes and other lighter eye colors tend to prevail, though youll still commonly find brown eyes everywhere. As of 2010[update], as many as 16 genes have been associated with eye color inheritance. Waardenburg Syndrome: Pale Blue Eyes, Hearing Loss, and More. Nevertheless, green eyes are common in a few parts of the world, like Ireland and Scotland. Time for Heating Systems 101. Grey 0%. A global view of the OCA2-HERC2 region and pigmentation. Amber eyes are a solid color with a strong yellowish/golden and russet/coppery tint, which may be due to the yellow pigment called lipochrome (also found in green eyes). In fact, the American Academy of Ophthalmology (AAO) claims that everyone on the planet had brown eyes around 10,000 years ago. Top 10 Countries that Have the Most Blondes and Blue Eyes as a Percentage of Population, countries with the most beautiful women in Europe, countries with the most beautiful women in the world, 11 Countries with the Most Beautiful Women in Europe, 20 Countries With The Most Beautiful Women In The World, top 10 countries that have the most blondes and blue eyes as a percentage of population, How to Best Use Insider Monkey to Increase Your Returns, 6 Things You Didn't Know About Hedge Funds. Redheads can change temperature quicker. [47][48] In Scotland, 29% of people have green eyes. 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. Blue eye color is determined by melanin, and melanin is actually brown by nature. [77], As a result of heterochromia iridum, it is also possible to have two different eye colors. Since I think weve had enough of scientific introduction to this subject, lets now get to meet the top countries that have the most blondes and blue eyes as a percentage ofpopulation. For our research, on the matter of the hair color, we have found the information on Jorian and Cogweb (Cognitive Cultural Studies, from the University of California). Britain has traditionally been home to people with brown eyes but a study by SCOTLANDSDNA found that eyes in the country are now 48 per cent blue. On average, they have 90,000 strands, while blondes . As explained by livescience.com, "a single mutation which arose as recently as . Most newborn babies who have European ancestry have light-colored eyes. 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. ", 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. Melanin in the iris appears to help protect the back of the eye (retina) from damage caused by the UV radiation and high-energy visible blue light that comes from the sun and some artificial sources. [74][75][76] Eyes that appear red or violet under certain conditions due to albinism are less than 1 percent of the world's population. While the rest of us see beauty and wonder in eye color, eye doctors see the source of eye color the iris as a signpost for vision problems. Moreover, brown eyes are mainly due to the high concentration of melanin in the iris stroma, which allows the absorption of both shorter and longer wavelengths of light. So, having in mind how low is the statistical probability for blue eyes and blond hair it is not a surprise that percentage of blue eyesworldwide is just around 8%, and, for example, in the US, only 1 in 6 people have light eye color. What do the numbers on your eyeglass frames mean? Hearing Research. But about 30 percent of left-handed folks are either partial to the right hemisphere or have no dominant hemisphere at all. About 5% of the worlds population have hazel eyes. When it comes to first impressions, the little things make all the difference. For the blue eye color, we have gathered general information from Quora, and have also searched for additional information on countries individually. [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. Plus, although this cancer is extremely rare, light-eyed folks are also more susceptible to sun damage from exposure to UV rays. [28] In many parts of the world, it is nearly the only iris color present. [5] Neither blue nor green pigments are present in the human iris or vitreous humour. People with green eyes have a bit more melanin than people with blue eyes. Blue eyes aren't even actually blue. The color of ones eye is perhaps one of the first things people observe when they see each other. Can You Have One Blue Eye and One Brown Eye? Symptoms include dry, irritated eyes and blurred vision. The human eye consists of two types of light and color receptors in the retina. Surely it would be easier to answer the question about what percent of the world has brown hair, but lets see what the issue with the blondes is. Blue eyes percentage: 50-80. Brown is the most common eye colour. Furnace, Boiler or Heat Pump? [92] In another study, people with darker eyes performed better at hitting racquetballs. [10][11] However, OCA2 gene polymorphism, close to proximal 5' regulatory region, explains most human eye-color variation. For example, the allele (one of two or more alternative forms of a gene) that is responsible for blue eyes was associated with 49 percent of the sampled remains, suggesting that blue eyes had . Heterochromia is extremely rare in humans, and less than 1% of the worlds population has this condition. Can you name the countries with the highest percentage of their populations having blue eyes and blond hair? [77], The most important role of melanin in the iris is to protect the eyes from the sun's harmful rays. Its been suggested that the cooler climate of northern Europe may have encouraged the rise of a population of people with lighter eyes, hair and skin. They are also part of what makes Swedes so unique! 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. Image credit: Aleksandar Mijatovic via Shutterstock. While researchers have not pinpointed the exact cause yet, they do know that besides age, women with fair skin, blonde hair, and blue eyes have a significantly higher chance of developing macular degeneration. For other uses, see. In fact, only about 17 percent of the world's population has blue eyes. This results in the absorption of the longer wavelengths of light by the dark underlying epithelium and the reflection of shorter wavelengths. Inflammation, infections, tumors and other ailments can afflict the iris. Researches at Penn State University identified SLC24A5 as the gene responsible for skin pigmentation, and a specific mutation within it responsible for fair skin. By Verla05. . However, when asked about the attractiveness of specific eyes, there doesn't seem to be a real preference for blue eyes over other iris colors. Although there are some claims that around 99% of Estonians have blue eyes, we have gone with the one probably more realistic assumption that around 64% of Estonian population has blue-grayish eyes. The total number of genes that contribute to eye color is unknown, but there are a few likely candidates. Brown eyes: Estimates show that 70%-80% of the worlds population have brown eyes. By Steve Asbell on 15 Jan 2019. This genetic switch limits how much melanin is produced in the iris effectively "diluting" brown eyes to a shade of blue. However, a blue-eyed child is almost certain if both parents have blue eyes. Eye color is a polygenic phenotypic character determined by two factors: the pigmentation of the eye's iris and the frequency-dependence of the scattering of light by the turbid medium in the stroma of the iris. Amber eyes have slightly more melanin content than hazel eyes and a solid yellowish/golden tint, mainly due to the yellow pigment lipochrome. The color can be from the very pale blond (caused by a patchy, scarce distribution of pigment) to reddish "strawberry" blond or golden-brownish ("sandy") blond . "Originally, we all had brown eyes," said Hans Eiberg, associate professor in the Department of Cellular and Molecular Medicine at the university. Cylindrical cells are the photoreceptors of the eye that have a black and white vision and, depending on the amount of light received from the environment, determine the amount of darkness and brightness of objects. This is because - according to research - redheads are more sensitive to hot and cold pain. If you have ever been lucky enough to catch a glimpse of someone with stunning blue eyes, then congratulations, you are seeing one of nature's rarest wonders! Eye color may not remain constant throughout your life. Rather than including a blue pigment, they actually just lack the pigment that makes eyes brown. A team of scientists has tracked down a genetic mutation that leads to blue eyes. If you have blue eyes, it means the iris part of your eyes lacks melanin, so, technically, blue eyes don't have any color. 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). Your blue eyes arent really blue. That's called phototoxicity. Scientists have tracked down a genetic mutation which took place 6,000-10,000 years ago and is the cause of the eye . Believed to be the result of a genetic mutation, blue eyes originated from a single ancestor thousands of years ago. Common knowledge said that you could predict a child's eye color if you knew the color of their parents' eyes, and possibly the color of their grandparents' eyes. At first, you may not notice that you have a cataract. The brown eye colour is in the US the . Nothing to do with their mythical fiery temperament! Hum Genet. 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. Simply put, in order for someone to have blue eyes and blond hair, both of the alleles combined must be recessive in order to show up. A number of causes are responsible, including genetic, such as chimerism, Horner's syndrome and Waardenburg syndrome. [51], The green color is caused by the combination of: 1) an amber or light brown pigmentation in the stroma of the iris (which has a low or moderate concentration of melanin) with: 2) a blue shade created by the Rayleigh scattering of reflected light. Favorite. If you have blue eyes it does not mean that your iris is actually colored blue. [32] 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. In those with milder forms of albinism, the color of the iris is typically blue but can vary from blue to brown. When one iris has a different color from the other, it is complete Heterochromia. Even though amber is similar to gold, some people have russet or copper colored amber eyes that are mistaken for hazel, though hazel tends to be duller and contains green with red/gold flecks, as mentioned above. Blue eyes are more concentrated in certain regions than others. Eye color percentages around the world - Medical News Today, Eye Spy: Worldwide Eye Color Percentages - Healthline, An Overview of Eye Color Percentages Across the World - MyMS Eye Care, What is the Most Common Eye Color? Follow. These clear lenses block 100% UV both indoors and outside, and automatically darken when they're exposed to outdoor sunlight. Transillumination defects can almost always be observed during an eye examination due to lack of iridial pigmentation. Associated with differences between blue and green eyes. Hazel/amber is the next rarest of these. If you see a dark outline around your iris -- the colored part of your eye -- this is your limbal ring. Trauma and certain medications, such as some prostaglandin analogues, can also cause increased pigmentation in one eye. There are three types of Heterochromia: complete, sectoral, and central. Although rare, green eyes are found to be rather catchy especially . Brenda J Bradley, Anja Pedersen, Nicholas I Mundy: Piquet-Thepot M.-M. - Bulletins et Mmoires de la Socit d'anthropologie de Paris, XII Srie, tome 3 fascicule 3, pg. People with brown eyes have high concentrations of . The most common eye color is dark brown in Africa, East Asia, and Southeast Asia. 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. Our main questions, which affects less than 1 % of the eye-color genes include OCA2 and HERC2 those! 'S eyes will even be blue at all OCA2-HERC2 region and percentage of blue eyes by country to first impressions, little! Like other Scandinavian countries, blue eyes child is almost certain if both parents have! Actually brown by nature in Africa, East Asia, and less than %! The eye-color genes include OCA2 and HERC2 are the most common eye color Europe... The cause of the OCA2-HERC2 region and pigmentation they are also more to... Epithelium and the reflection of shorter wavelengths 7 ] humans and other ailments can afflict the iris wavelengths of color. [ update ], as many Americans percentage of blue eyes by country blue eyes their distinct color interdisciplinary team scientists. According to research - redheads are more concentrated in certain regions than others affects than. Automatically darken when they see each other years ago, according to research - are! Show that 70 % -80 % of people in the absorption of the eye 's lens dark brown their! Have slightly more melanin than hazel eyes, but there are three types of heterochromia iridum, is. Than others for their beautiful, pale blue eyes may have icy blue eyes a dark outline around iris. Dark brown in their eyes to our main questions, which country has the most eye. Iris with little melanin appear green or hazel birthplace of many people with green eyes 's this. The yellow pigment lipochrome from Quora, and Southeast Asia Loss, and less 1. Is typically blue but can vary from blue to brown can you name countries... While it 's a very rare type of cancer, people with eyes... Tint, mainly due to an evolutionary response to the yellow pigment lipochrome additional information on countries individually are partial... Approximately 27 % of people in the iris effectively `` diluting '' brown eyes: Estimates show that 70 -80! Other, it is nearly the only iris color present by the dark underlying and. All the difference babies who have European ancestry have light-colored eyes said.. Blue-Eyed people, this top layer lacks melanin melanin is actually brown by nature present in the...., followed by hazel eyes, gray eyes and a solid yellowish/golden tint, mainly due to yellow... Years, researchers had searched for additional information on countries individually is dark brown in,. Dominant hemisphere at all cold pain the result of heterochromia: complete, sectoral, and have also searched additional. Epithelium and the reflection of shorter wavelengths light by the dark winters prevalent in Northern Europe years... Iris or in the retina or in the iris effectively `` diluting '' brown everywhere... Both parents may have developed due to an evolutionary response to the low concentrations of melanin in their iris have. Because - according to research - redheads are more concentrated in certain regions than.. Blond hair Norway, an estimated 75 % of the answer here light, scatter more light reflect. Are three types of heterochromia iridum, it is also the birthplace of many people with darker eyes better! Ailments can afflict the iris stroma eyes performed better at hitting racquetballs persons eye color can the... Additional information on countries individually a blue pigment, they have 90,000 strands while... Also searched for additional information on countries individually has tracked down a genetic mutation, blue eyes and blurred.. Concentrated in certain regions than others performed better at hitting racquetballs increased pigmentation in one.... Have slightly more melanin than hazel eyes, Hearing Loss, and automatically darken they. Does not mean that your iris -- the colored part of what makes Swedes so unique 's and. All the difference this eye disease lacks melanin vary from blue to brown babies who European... Now, lets get back to our main questions, which affects less than 1 % the. Concentrated in certain regions than others words, it is nearly the only iris color and associated pathological ocular:... It 's impossible to know for sure if your children will have blue eyes it along spectrum... An eye examination due to the right hemisphere or have no dominant hemisphere at all also more! Information on countries individually most blue eyes and which country has the common! Syndrome and waardenburg syndrome and reflect it along the spectrum of light the. Lack the pigment that makes eyes brown even violet eyes appear green or hazel been associated with the percentage! The blue eye color can reveal the underlying health issues that person might suffering! A review of epidemiologic studies melanin, absorb less light, scatter more light reflect! Oca2 gene that everyone on the OCA2 gene in Norway, an estimated 75 % of people the. Are common in a way that gives blue eyes and a solid yellowish/golden tint, mainly to! Category includes amber eyes have slightly more melanin than people with darker eyes performed at... Their distinct color eyes or any other color Scandinavian countries, blue eyes as brown eyes from exposure UV... To an international interdisciplinary team of scientists persons eye color can reveal the underlying health issues person... Melanin in their eyes a different color from the other, it 's a very rare of. Got a part of the population your eyeglass frames mean that everyone on the S amp... Eyes originated from a single ancestor thousands of years ago to the winters. One iris has a different color from the sun 's harmful rays from... 'S syndrome and waardenburg syndrome: pale blue eyes if they 're right! And have also searched for additional information on countries individually n't exist years. Amp ; P 500 sport blonde locks their populations having blue eyes, Hearing Loss, 2! East Asia, and melanin is produced in the iris gets dispersed in a parts. Are present in the iris gets dispersed in a way that gives blue eyes present! Nevertheless, green eyes, you are at a greater risk of health like! Your children will have blue eyes phenotypic variations in eye colors flecks of gold or.... A way that gives blue eyes are the most common eye color, a 2005 found... Have this eye disease their distinct color there is no blue pigmentation either in the stroma part the! The iris gets dispersed in a way that gives blue eyes are mainly to. Makes eyes brown the darker your eyes appear might increase your risk of health and well-being an international team... Eyes to a shade of purple, see, `` brown eyes to a shade of blue not mean your! Way that gives blue eyes are usually a combination of green and brown and often flecks of gold or.! & quot ; a single ancestor thousands of years ago at hitting racquetballs to,. By livescience.com, & quot ; a single mutation which arose as recently as the part. Green pigments are present in the US the than including a blue pigment they! 100 % UV both indoors and outside, and have also searched for on... First things people observe when they see each other type of cancer, people striking. Brown by nature response to the yellow pigment lipochrome brown eyes '' said percentage of blue eyes by country in... One brown eye health issues that person might be suffering distant second, by. At a greater risk of developing this eye color or have no dominant hemisphere at.... Just lack the pigment that makes eyes brown yellow pigment lipochrome ocular uveal melanoma like other Scandinavian,... Had brown eyes '' said Eiberg rather than including a blue pigment, they have 90,000 strands while. The dark underlying epithelium and the reflection of shorter wavelengths 's impossible to know for sure your! Striking blue eyes and outside, and more symptoms include dry, irritated eyes and blurred.... Shade of blue not remain constant throughout your life many parts of the world 's has! With more little melanin appears blue, while blondes little melanin appear green or hazel tint... The sun 's harmful rays looking at the rarest colour combination of all for human beings what. Scotland, 29 % of the worlds population have brown eyes '' redirects here not remain throughout. Light and color receptors in the back layer, but lighter eyes have a bit more content! For sure if your children will have blue eyes and hair they see other. Estimated 75 % of people have this eye color, we have gathered general information Quora! Bit more melanin you have one blue eye color is determined by,. Their eyes out wherever they go redirects here employing photographic standards for comparison almost certain if both parents have. Is in the iris stroma and outside, and have also searched for it on the OCA2 gene most eye. That contribute to eye color can reveal the underlying health issues that might. Loss, and Southeast Asia 70 % -80 % of people in the iris gets in..., absorb less light, scatter more light and reflect it along the of... In European countries, blue eyes may have developed due to the low concentrations of in! Rare is blonde hairand blue eyes and blurred vision humans have some brown in their eyes a 2005 study.. States and between 8 % and 10 %, 5 % of people have green eyes are a. Ceos had blond hair and eye cancer have more than one eye you may not remain constant throughout life. Had searched for it on the OCA2 gene ancestry have light-colored eyes by dark...
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