For example take a tree. How can our brains tell that it is a big tree far away instead of a smaller tree which is just closer to us?
In: Biology
Long time ago my coworker told me a cool story about her friend who was born with some genetic issue that took away his ability to perceive depth. His whole life was 2d until he was 21, he tried LSD with some friends and for the first time in his life he saw the world in 3d.
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