![]() ![]() So, this is what makes people with blue eyes more likely to have age-related macular degeneration. This makes lighter eyes more sensitive to light. This means more light is able to penetrate blue eyes. The research shows that there is less pigment in blue eyes, and green eyes for that matter, than there is in brown eyes. People who are born blue-eyed are at higher risk of developing age-related macular degeneration. But what specific diseases are these, and what can be done to prevent them? Let’s discuss a few of the options below. So which side is actually correct? According to the majority of the research that has been done, blue-eyed people are, unfortunately, at a higher risk for developing certain eye diseases. ![]() Some say that there is no indication that blue-eyed people are at any higher risk than brown-eyed people others say the opposite. There is some truth behind this supposition, though it has been a matter of debate among scientists and medical professionals for a while. It doesn’t seem fair – after all, you have no control over what color of eyes you were born with. That's why blue eyes contain low amounts of melanin.Īnd low amounts of melanin are related to vitamin D, which is related to living in northern climates.You may have heard that if you have blue eyes, you’re at a higher risk of developing eye diseases. Someone with a lot of melanin could have blue eyes, but they wouldn't appear blue do the the melanin. Again because of a gene mutation which control how much melanin is deposited in hair, skin, and irises. And North Africa is full of Caucasians, hell even German tribes, Goths if I recall correctly, settled there during Roman times. However blue eyes are not found within the population of East Asia, due to the major pre-dominance of the brown eye gene in the area.Ĭentral Asians, people from the Caucasus, Afghans, Pakistanis, and even Indians darker then many an African are considered Caucasian. It can rarely occur as far south as Sri Lanka. They're also found in parts of North Africa, West Asia, and South Asia, in particular the northern areas of India and Pakistan. They went so far as to map the parts of the country with the highest and lowest percentage of blue-eyed people.įrom your wikipedia link: Blue eyes contain low amounts of melanin.īlue eyes are most common in Northern Europe and Central Europe and to a lesser degree in Southern Europe,North America and southern Central Asia Afghanistan is a notable example. In the 1930s, eugenicists used the disappearance of blue eyes as a rallying cry to support immigration restrictions. Blue eyes, a genetically recessive trait, were routinely passed down, especially among people of Scottish, English, Irish, Welsh, Western and Northern Slavic, and Northern European ancestry. A century ago, 80 percent of people married within their ethnic group. The plunge in the past few decades has taken place at a remarkable rate. Blue eyes have become increasingly rare among American children with only 1 out of every 6 – 16.6 percent which is 49.8 million out of 300 million (22.4% of white Americans) of the total United States population having blue eyes. More than you ever wanted to know about eyes: Ī 2002 study found 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. "Don't only Caucasians have blue eyes?" No. And yet most people living in the north even today lack vitamin D.Īlso, I thought all of the above is common knowledge which makes me question the whole article. Inuit get more due to their diet, and modern man also gets much more again because of diet. In northern climates with less sun, and skin being covered or you die of exposure, often even when the sun is up, people get a lot less vitamin D. It is produced when UV light hits the skin. how a redhead of the same (advanced) age looks.Īnd why would Caucasians have a mutation which deposits less of such a useful protein? Vitamin D. I think also irises? Asians and Africans both have the normal version of the same gene.Īnd melanin has many roles, sun protection being just one, the other is as a structural protein. Don't only Caucasians have blue eyes? And aren't they (full disclosure "we" in my case) also the only ones with the mutated version of the gene which controls how much melanin is deposited in skill, hair and. ![]()
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