Given natural selection is true, why do we still have genetic eye sight issues? Because I would think bad eye sight would get you killed (or at least the inability to eat) in a hunter gatherer society.
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Evolution stands still for no one, baby! Lions are hella inbred but they all have perfect teeth because they need those to live. Humans, by contrast, no longer need good eyesight or straight teeth to survive so those traits no longer leads to people dying prematurely.
It’s the same thing with how women’s hips are getting narrower due to the invention of safe C-sections. Evolution usually moves real slow, but it can be relatively fast sometimes, e.g. elephants born without tusks tend to survive because a predator species (humans) are hunting them for the ivory.
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