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I am doing a science fair project and realized that the amount of pigment in the iris can affect eyesight. I was wondering if any opthomologist out there knows!!

What is the amount of pigment in the iris for each eye color?

brown - large amount of melanin

hazel - moderate melanin and Rayleigh scattering

amber - lipochrome pigment

blue - low, such as eumelanin

green - moderate melanin

grey - least amount

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