I know that eye color is directly related to the amount of melanin present in the front layers of the iris. But what’s the biological need behind different color?
In: 98
There isn’t always a biological need for diversity, especially in populations like humans where we tend to try to keep everybody alive. Even if your genes deal you a bad hand, your community will likely make sure you don’t die. Needing glasses is a much bigger hit to your survival prospects than eye color, and we fix that. Even blind people have resources available to them.
Basically, a lot of the diversity you see in humans is because differences exist randomly and we don’t let anything kill those people because of it
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