Question

What is stereopsis? How is it related to having 2 eyes?

Answer 1

the perception of depth produced by the reception in the brain of visual stimuli from both eyes in combination; binocular vision.

Answer 2

Stereopsis (from the Greek στερεο- stereo- meaning "solid", and ὄψις opsis, "appearance, sight") is a term that is most often used to refer to the perception of depth and 3-dimensional structure obtained on the basis of visual information deriving from two eyes by individuals with normally developed binocular vision.

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