TIL that due to a genetic bottle neck, 10% of the population of the pacific atoll of Pingelap has achromatopsia, i.e. only sees in black&white
go $fsck yourself @ gofsckyourself @lemmy.world Posts 14Comments 1,232Joined 1 yr. ago
go $fsck yourself @ gofsckyourself @lemmy.world
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Well, it states "total color blindness" so, effectively none.
My point is that when you have "total color blindness" it simply means you cannot effectively discern the difference of of color. That does not mean "black and white."
For example, everyone has a blind spot in their eye where the optic nerve passes through the retina. This area has no photoreceptor cells, so there is a spot in each eye that cannot see. When you look through one eye and close the other, do you see a black void spot? Is it a blank white area? No. It's just... nothing.