From an evolutionary stand point of view, why do caucasians have round eyes and asian people slitted eyes?
437855
Maybe the "survival of the fittest"-rule doesn't count for every little detail in the genetic code. Is this possible?\n\nMaybe there was no particular function for this. Maybe the forefathers of asians and caucasians where quite simply different looking, one moved west the other east. They had no more contact and so each developed into a distinct race, with their own features.\n\nI don't know, i'm neither a biologist, nor a historian, nor anything else. \nIntriguing question. congratulations.
22851
Koreans tend to have sharper features than japanese, higher cheekbones, and are less likely to have epicanthic folds than Japanese. Also, they tend to have 'flatter' faces than Japanese.  Women also use earth tones - browns - and Japanese women tend to use reds (in lipstick and makeup).  Also, generally korean women tend to be taller, with sharper, more triangular heads - sharp chins, high cheekbones, sharper eyes.  Chinese look different depending on if their ancestry is from northern china or southern china - southern chinese tend to be smaller, browner, and have more rounded features. My fuzzy logic and heuristics work well enough to usually get it right though. When in doubt, listen to the accent. And this only goes for people born and raised in their respective countries.  American born asians get a look all thier own.
883493
It's genetic in most people.\n\nThe second main cause is a change in melanin levels in one eye, this can be because of illness or trauma to the head.\n\nFor others a trauma to the head can jolt the blood vessels in the eye causing a change in colour
406406
Your genetics determine eye color.  The iris (colored part) of your eye has pigments in it to protect it from the sun, kind of like your skin does.  Blue eyes=not a lot of pigment....brown eyes=lots of pigment.  Albino people don't have any pigment there, so they tend to have pink eyes that are very sun-sensitive.
312693
I point out that "God made them" fails entirely to explain the situation.  Adam and Eve cannot contribute enough different versions of genes (four total, assuming no duplicates) to account for the modern diversity of hair color, much less the really complicated traits (over 100 different versions in some cases).\n\nAncestral humans were dark haired.  Mutant genes for different hair colors have occured at various times in history.  Caucasians seem to have several.  It's not clear why.  It's suspected that it may have to do with general color reduction to allow us to produce more vitamin D (I think that's the one we produce with sunlight).  Dark hair on the body would absorb light and keep it off the skin, just like melanin in the skin would absorb it and keep it from being used.\n\nThe people who lived in Japan before it's current ethnic group moved in had a red hair gene that was fairly common and still crops up on occasion in Japan to this day, though not at all often.
111886
Your question is "Why are some people eyes whiter than others?"\nThe answer: Cos some people take care of them much better than others, or are not stressing them that much in comparison to the red eyed ones.\nIt cud also be genetic.
1066631
Some oriental children may be reading too much. please let explain.\nThere is some scientific evidence that heavy reading during childhood ( and a commensurate, far vision when outdoors), causes abnormal growth to the eyeball so that that focus is not on the retina. (either in front of it or behind it),. So the retina gets an out of focus picture. The curvature of eyeglass lenses corrects that focus to bring the light to focus on the retina giving a sharp image.\n    There will soon be medications that will speed up or slow down eyeball growth in order to get the light to focus on the retina\nDepending on the developing condition.\nFor more information on this subject, visit the library and read anarticle in the 23 November 2002  issue of New Scientist Magasine.\nDan the Answers-Man.\nExtra point appreciated & never refused.
339023
Brown eyes\n \nBrown eyesThe vast majority of the world's people have dark eyes, ranging from brown to nearly black. Light brown eyes are also present in many people, but to a lesser extent. Most of the original inhabitants of Africa, Asia, and the Americas have brown eyes. Brown eyes are also found in Europe, Oceania and North America, though within European populations they are not predominant to the same extent
428245
Haha, just call all the white people Goggle Eyes and you will feel better about yourself. I personally have a thing for asian eyes...probably why I ended up with a Fillipino.
466113
Why are white people pale?\nWhy are Negroes dark?\nWhy do Asians have slanted eye?\n\nIt"s all in the DNA.\nVariety of life.\nAsk God.\n\nYou are an Idiot.
1039939
Genes don't skip anywhere!\n\nBut eye colour is determined by at least three genes, not just one. So it gets a bit complex. See below.
537347
It's because, generally, Asian people have smaller 'frames' than Westerners. If you have a small bone structure it follows that your hips will be narrow. This is changing however, and Asian people are gradually becoming taller & wider - in a hundred years or so they might be like YOU & ME!!!! AAAaaaarrggh!!!! (But by then, OUR descendants will be the size of elephants!)
731741
I haven't seen that personally.  Actually, according to scientific studies, people with lighter eyes (especially bright blue) tend to have more eye problems than any other eyecolor.  There could be some vitamin or mineral deficiency that Asians have that I am unaware of though.
463347
I believe eye color is sex linked.  I think wing structure is too (like normal versus vestigial).
321713
I once heard a story that human beings at one stage in their development did have a third eye,I don't know if there is any medical evidence of this or not,it will be interesting to read your replies
252453
It probably made the ones with weaker eyes survive and reproduce, where they would have easily died without glasses, and that's why so many people have the eye problems that are present today.
99056
From Mongolia... so did koreans, japanese and all the other folks with squinty eyes (no disrespect meant)