melanin(pigment) is responsible for determining our eye colour.But it may be genetic reason only.
2006-10-27 15:47:31
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answer #1
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answered by purush bio 2
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What makes your eyes blue? Why are my pupils so big? Can my eyes change color?
Nearly all Caucasian infants have blue eyes. This is mainly due to the fact that there are very few "melanocytes", or pigment cells, in the iris. And those melanocytes that are present contain very little pigment. In black and brown races the iris stroma is more dense and the melanocytes contain more pigment, giving rise to a blue-gray appearance. In all races, the pigment cells multiply as the child grows but if the cells contain little to no pigment the eye will stay relatively blue. So, in reality, there are no REAL blue-eyed people, just those that failed to develop brown pigmented melanocytes!
Most of you with light-colored eyes have probably noticed a "spot" or two of brown on your eyes. These are clumps of melanocytes that happen to contain more pigment. These may be called "nevi" or just plain "freckles". They are not unlike those spots on your skin that you call freckles; just a clump of more highly pigmented melanocytes.
Now we know that a lot of pigment will produce a brown eye and that a lack of pigment will produce a blue eye. What about those green eyes? And the hazel? This is a little trickier. A light dusting of brown melanin cells on the iris will produce a yellowish color. Combine the natural blue with the fine scatter of melanin (yellow) and you'll get from a green to hazel color.
Can your eyes really change color? Well, not really, but they certainly can appear to change. All of what we see around us is REFLECTED light. When you look at an object or even another person, you are actually receiving reflected light into your eyes. If that object was illuminated with red light, you would see that object as red, even though it may in fact be white. The melanocytes of the iris do not change (except in infants and the elderly) and therefore are not responsible for periodic eye color changes. The light around you does change, however, especially reflected light....from the color of the room, the sky, and your clothes.
2006-10-27 15:58:21
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answer #2
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answered by Anonymous
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So sorry dear Omega, I hate that you are so cold and I can't help you get warm with a blanket or a hug or some soup (maybe all 3). I'm also sad that I have blue eyes too. I always kind of liked them but I also love brown or green eyes. I don't think it's wrong or gay to like or want different eye colours. I knew a lady who said she suffered a terrible fever as a child and a few days after she started feeling better, she noticed that one of her eyes had turned brown and the other one stayed the deep blue she was born with. There was no explanation given by her doctor. If you see pictures of her as a little girl, both eyes were absolutely blue and then one of them was really brown. Your eyes are a window to your awesome soul, Tris. I am sure your soul is a peaceful colour. I always loved blue crayons and play-dough too. My Mum used to make play-dough and colour it with tempra powder. I got in trouble for eating it once too :]]] I wish there were a way to make your eyes a different colour. It's getting seriouslylate now, so goodnight dear Tris. Feel better and remember that you are greatly admired and loved beyond words. Love, ~Rob
2016-05-22 02:13:41
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answer #3
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answered by Jean 4
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The simple answere is "protiens". BUT, you DO mean heredity. There is a set of genes which determined that I would be near-sighted. Another that my eyes would be blue. "All" the genes do is control what protiens are built - and those protiens are, simplisticaly, how we look, how we are put together, what we are physically,... and what color light is reflected off the iris of our eyes.
2006-10-27 15:54:03
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answer #4
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answered by Richard S 6
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This i am not sure about but my 3rd daughter had blue eyes up until she was 4 then all of a sudden they changed to the most beautiful olive colour
2006-10-28 23:37:56
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answer #5
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answered by thunderchild67 4
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Pigment. Like the same thing that colours your skin (did you know that there is no pigment in your palms? That's why darker-skinned people have lighter palms!). And it isn't entirely hereditary...except in males. Sixty percent of the time, males will have their father's eyes. And your eyes actually might change colour over time. because the pigment shifts with hormones.
2006-10-27 16:15:15
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answer #6
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answered by Smo 4
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The outer lens, its the same principal you get when you look through the edge of a pain of glass. You see different colours due to different thickness/density.
2006-10-27 15:44:30
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answer #7
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answered by A True Gentleman 5
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pigmentation of your iris
2006-10-27 16:41:36
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answer #8
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answered by SAM S 2
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cone cells
2006-10-27 15:53:02
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answer #9
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answered by Ashley S 2
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the iris
2006-10-27 15:44:22
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answer #10
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answered by nicole 6
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