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Thread: Blue Eyes Versus Other

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    Senior Member Zogbot's Avatar
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    Quote Originally Posted by Deifr View Post
    Nice Ad hominem...
    So, errr, what advanatge (other than them maybe looking better, and being uncommon amongst most non-European groups) do they have then?
    Hard to say. I doubt any studies have been done on it. I would say that it's fairly obvious, seeing as blue eyes have taken more effort to evolve.

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    Quote Originally Posted by Deifr View Post
    Nice Ad hominem...
    So, errr, what advanatge (other than them maybe looking better, and being uncommon amongst most non-European groups) do they have then?
    Eye color, as an inheritable trait, means that it must correlate with other inheritable traits. Or simply put, it is an indicator of a different historical record of inheritance, it is disputable whether brown eyed colored individuals can or cannot have the same genetic make up as well, however with blue eyes we can be certain
    "Nothing is more disgusting than the majority: because it consists of a few powerful predecessors, of rogues who adapt themselves, of weak who assimilate themselves, and the masses who imitate without knowing at all what they want." (Johann Wolfgang Goethe)

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    Quote Originally Posted by simplex View Post
    This is from wikipedia.org. It says blue eyes are much more easily damaged by sunlight then green or brown eyes. If so, do blue eyes have any special benefit or are they simply worse? Here is the quote:
    I don't understand how they'd be more susceptible to damage simply because they're blue, I say they're prettier because they're unique. Almost every human being in this world has brown eyes, even the majority of White Europeans have green, hazel, or brown eyes.

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    Effort? It was a mutation. This was a mutation in one person. The advantages? Probably not much apart from that lighter eyes look better. It does not look nice when you can barely see any contrast between the iris and somebodies pupil.
    http://www.sciencedaily.com/releases...0130170343.htm

    The only one I have heard is on average, people with blue eyes are more sucessful in education/life. But this does not mean the eye gene causes this, just there could be other genes that blue eyed people generally carry. You have also got to think of the data sample for those who believe in races being different. Also the larger variation in brown eye genes.

    Here is an article on this, but I have no idea what the sample data is:
    http://www.healthlibrary.com/news132.htm

    But with the generalisations of that article, switch the eyecolours round and it seems to match me and my brother.

    I have found another interesting article while checking what I am writing:
    http://www.thetech.org/genetics/ask.php?id=160

    One theory is that people with blue eyes also tend to have lighter skin (the same pigment that makes brown eyes also makes dark skin). In places with less sunlight, lighter skin can help the body make Vitamin D.

    You need vitamin D to avoid bone diseases like rickets. In fact, lack of vitamin D used to be a big problem before refrigeration and vitamin D-fortified milk. So, lighter skin means you are less likely to get rickets.

    Let's say you randomly get a mutation that gives you blue eyes and light skin. Now if you live where there isn't much sunlight (Northern Europe, for example), you will be healthier than your dark-skinned neighbors.

    Being healthier means you are more likely to have kids. And some of these kids will have blue eyes and be healthier as well. Eventually, you end up with lots of people with blue eyes.

    Of course this is just an idea, and most people without blue eyes who live in dark places can live healthy lives and can also have lots of kids too. Another theory is that blue eyes made it more difficult to survive in sunny places.

    One idea is that light skin allows sunlight to destroy a vitamin called folate. You need folate to have healthy babies. If women don't get enough folate while they are pregnant, the baby can be born with birth defects. And if men don't get enough folate, they don't make as many sperm.

    This would mean that people with blue eyes and light skin living in bright areas would have less healthy kids. So the genes for blue eyes would be less likely to get passed on in sunny places.

    Or maybe both ideas came into play- blue eyes in dark places provided more vitamin D, and brown eyes in bright places provided more folate. So, less light did not cause the mutations for blue eyes, but it might have made the mutations more likely to stick around.
    I don't think blue eyes see better in the dark. But I doubt the difference is large:
    http://eccentricscientist.wordpress....ter-than-blue/

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    hmm. the lack of sun exposure can be linked to the increase in multiple sclerosis cases, sun exposure helps the body make vitamin D which helps maintain a healthy neurological system.

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    I've read somewhere that dark irises are more easilly affected by snow blindness than blue irises. Unfortunately, I can't find any article nor source concerning the subject right now. But it would explain why blue irises are more common in snowy places than elsewhere.

    But then again, eskimoes usually don't have blue eyes...

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    Dr. Brian G. Pazzo, an ophthalmologist at NewYork-Presbyterian/Weill Cornell hospital said, "In terms of light sensitivity, which is also called photophobia, light-colored eyes, like light-colored skin, have less of the pigment melanin and are probably more susceptible to the harmful effects of the sun, like certain types of eye cancer, but I know of no good long-term studies that demonstrate that blue eyes are more sensitive to light."

    By the way, as far as rarity goes, green eyes are the most rare.

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    My eyes are medium blue and I often squint even on cloudy days. Sunglasses are a must for me. For what it's worth, I also have pretty bad eyesight and have worn contacts since I was 14. I get complimented on my eyes quite often, though, and I wouldn't change them

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    I have an odd mix. My eyes look blue from afar, but once you get very close you see the right one has an odd tint of green.
    Ein Kampf, Ein Sieg! Fur Prussia!

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    Quote Originally Posted by Kadski View Post
    I have an odd mix. My eyes look blue from afar, but once you get very close you see the right one has an odd tint of green.
    Sounds a little like my fathers eyes. From upclose I can never quite put my finger on whether they're blue or green. They're not grey, as they certainly have a bluey/greeney colour, however they're so pale they're nearly white.

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