Why can (most) eyeballs be controlled to go in the same direction as well as cross-eyed, but not in separate directions?
In: Biology
Going cross-eyed has practical application, mainly focusing on things very close to your face. At straight ahead, you’ve got that infinite focal distance some cameras have for landscapes. But going “wall-eyed” doesn’t help you focus on anything, it only makes it harder to see. There’s no reason for your eyes to have ever evolved to be able to do that.
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