Visual Perception
As the eyes of humans and other animals are in different positions on the head, they present different views simultaneously. This is the basis of stereopsis, the process by which the brain exploits the parallax due to the different views from the eye to gain depth perception and estimate distances to objects. Animals also use motion parallax, in which the animals (or just the head) move to gain different viewpoints. For example, pigeons (whose eyes do not have overlapping fields of view and thus cannot use stereopsis) bob their heads up and down to see depth.
Read more about this topic: Parallax
Famous quotes containing the words visual and/or perception:
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—Robert Doisneau (b. 1912)
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—Oliver Stone (b. 1946)