Different eye shapes?

[Bluesclueles]

How come there is cultural variation in eye shape? i.e. asian eyes

[dotcom]

I read somewhere that it was because of the environment, they may have evolvoled an overlapping skin on the eye because of the harsh conditions and so needed better protection for their eyes...................please if im wrong someone post the correct answer, cos id like to know aswell.

[Quizmonster]

Click http://www.geocities.com/beckermanlin/palerblack.h
tml for an interesting and easily-understandable outline of human genetics. (It's worth noting - before someone shoots this reply down in flames! - that nearly every idea ever expressed on that subject has been hotly disputed by someone or other, but this website is at least one scientist's viewpoint.) Once on the new page, scroll down to the paragraph that opens "Seal blubber aside..." and go to the sentence there that opens: "The Asian's eyelid..."

There is also a point sometimes made that - after the Ice Age had passed - only a relatively small breeding population was left scattered across the northern part of the world. As a result, any small physical difference was more likely to be passed on to future generations in any given locality and eventually - if it proved to be advantageous - out into wider populations. A combination of the above might explain today's widespread eyelid-shape variation.