That explains why brown eyes occur more frequently in the hotter climates of Africa and Asia than in Europe. Top 15 Traits of People with Brown Eyes 1. In a study in the journal Perception and Motor Skills, researchers tested 82 white women and 44 white men to see how quickly they could react to a stimulus. Just because so many people have brown eyes doesn't mean that all brown eyes are the same — far from it, in fact. A study completed in 2011 found some diseases, such as eye cancer and macular degeneration, are less common in brown-eyed people than others, leading to assertions that melanin is a form of protection. One study found that between 1899 and 1905, more than half of non-Hispanic white people in the United States had blue eyes. The researchers did not look at why this is true, but they did rule out other things that could make cataracts more likely, like smoking and eye injury. colored part of the eye is called the iris. On average, most people with blue eyes are sensitive to … While the reason why is unclear, it is believed that this is due to brown eyes having greater protection due to a higher level of melanin. Eye colour is directly determined by the amount of melanin, or brown pigment, in the iris, and this is determined by a combination of genes because eye colour is a polygenic trait. Rather, those eye colors and patterns are the result of a combination of melanin and how light scatters in the iris. On the flip side, a study found that people with brown eyes were just about twice as likely to develop cataracts than individuals with light eyes. With less melanin in the eye, less light is absorbed. It's important to note, however, that brown-eyed people's response to complex stimuli showed a similar trend, but the study labeled this response "nonsignificant." Technically, that would mean 0.17 percent (or about 13 million people) of the world’s population have red hair and blue eyes. So eyes with the least melanin in them will appear blue. The researchers in the study theorize that this preference is the result of what they call paternal anxiety, which is when men question whether or not their child is biologically theirs. In a study published by PLOS One, folks of the brown-eyed persuasion were perceived as more trustworthy than people with lighter colored eyes, notably in populations with a wide variety of eye colors. But in Europe, both the prevalence and shade of brown eyes vary significantly from region to region. Most of the people on the African and Asian continents have brown eyes, according to an article in All About Vision. That's just one more way that melanin is truly magical. Despite being one of the rarer pigments, some countries have high populations of blue-eyed people, particularly in Europe. Dark brown eyes are dominant in humans and in many parts of the world, it is nearly the only iris color present. So while it's good news for people with brown eyes (and darker skin), that's bad news for many of our fair-eyed friends. That would be melanin, which is a pigment that's present in everyone's body (except those with severe forms of albinism), according to an article in All About Vision. And each of the following colors are less than one percent of the world's population: gray eyes, red/violet eyes (in people with severe forms of albinism), and heterochromia (different colored eyes). In most people, the back layer has at least some brown pigment in it, even if their eyes don't look brown. People with light-colored eyes are often more sensitive to light. While the reason why is unclear, it is believed that this is due to brown eyes having greater protection due to a higher level of melanin. But it's bad news once again for our blue-eyed friends, as folks with azure peepers and fair skin are more at risk of type 1 diabetes, according to a study in Diabetes/Metabolism Research and Reviews. That person had a change in a gene that controls melanin production. Hazel eyes clock in at 5 percent, as do amber eyes, followed by green eyes at a paltry 2 percent. The brown eye color gene dominates while blue or green color gene is just recessive. Between 55 and 79 percent of people worldwide have brown eyes. In people with brown eyes, the iris’s front layer also has some brown pigment in its cells. For example, as I said, mine vary from pale greyish blue to turquoise. If they love you they will stick to you no matter how hard it is. But if you're a white person with coffee-colored peepers, it's likely that when you were born, you first stared out into the world with blue eyes, according to an article in Live Science. This may mean that since brown-eyed people are more sensitive to alcohol, they're less likely to ingest alcohol to the point of physical dependence, which is a good thing. The more melanin there is in the iris, the darker brown it will be. It seems odd that eye-color would be in any way connected to how well a person can tolerate pain, but science indeed confirms that it is. Jane Elliott (née Jennison; born November 30, 1933) is an American diversity educator. We compiled a list of some facts about People who have brown eyes color. According to a study in the American Journal of Ophthalmology, brown-eyed individuals are more prone to developing cataracts, which are cloudy areas in the eye that can cause vision impairment, according to the Mayo Clinic. Chances are some parents already learned that already on their own, which had to be an interesting experience! Within about 12 months, cells will begin to produce melanin, and as more melanin builds up in the iris, eye color may darken. Also, people with brown eyes have a lower risk of type 1 diabetes and melanoma of the eye, compared with individuals with light blue eyes. But it's not just common — it's overwhelmingly common, to the tune of 79 percent of the world's population, according to World Atlas. Most people living in Africa and Asia have dark brown eyes. Instruction Courses and Skills Transfer Labs, Program Participant and Faculty Guidelines, LEO Continuing Education Recognition Award, What Practices Are Saying About the Registry, Provider Enrollment, Chain and Ownership System (PECOS), Practice Forms Library - Job Descriptions, MIPS Solo and Small Practice Survival Guide, 2020 MIPS Payments: Understanding Remittance Advice Codes, Final Checklist for EHR/Non-EHR 2019 MIPS Reporting, Subspecialty/Specialized Interest Society Directory, Subspecialty/Specialized Interest Society Meetings, Global Programs and Resources for National Societies, International Society of Refractive Surgery. Macular degeneration, which is defined as the deterioration of the part of the retina that controls visual activity, is the number one cause of vision loss among older Americans, according to an article in All About Vision. One sample was comprised of 1862 white women who responded to a national survey, and the second was comprised of 10,860 white male prison inmates. More current research suggests that as many as 16 different genes could be responsible for eye color. And green eyes are similar to blue eyes, but they have more melanin in them, ergo the green color. It turns out that the bone structure of the face was also a significant factor in people's designation of an individual's trustworthiness, so brown eyes weren't the only trait that was being evaluated. The United States has the majority of Blue Eyes in the world. Although, given the damage that diabetes can cause a person's eyes, maybe it's not so random after all. Please SHARE if you find these results fascinating, and if you don't see your eye color, keep reading! Hence, their eye color turns brighter and dark according to their opinions. Last but certainly not least, brown-eyed people are apparently assumed to be better secret keepers than their fair-eyed friends. Brown eyes are the most common eyes in humans. But the prevalence of brown eyes varies significantly with geography. Being audacious is one more quality that describes an individual with brown eyes. You know how your eye color reveals personality type? However, we have included a list of available scholarships nationwide for those with brown eyes and others. If the iris has a little more melanin, then it will appear green or hazel. 3 Scholarships for People with Brown Eyes & Others. 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