zt: Green eyes are the product of light to moderate amounts of melanin. According to some researchers, green eyes are the result of mutations that change the melanin structure.[48] Green eyes are the rarest natural eye color found in humans. Only 1-2% of the world population has green eyes.
谢谢考证，很有趣：）
Google 来的：）
zt: Green eyes are the product of light to moderate amounts of melanin. According to some researchers, green eyes are the result of mutations that change the melanin structure.[48] Green eyes are the rarest natural eye color found in humans. Only 1-2% of the world population has green eyes.