Depth perception is the visual ability to perceive the world in three dimensions (3D) and the distance of an object. Depth sensation is the corresponding term for animals, since although it is known that animals can sense the distance of an object (because of their ability to move accurately, or to respond consistently, according to that distance), it is not known whether they "perceive" it in the same subjective way that humans do.
Depth perception arises from a variety of depth cues. These are typically classified into binocular cues that require input from both eyes and monocular cues that require the input from just one eye. Binocular cues include stereopsis, yielding depth from binocular vision through exploitation of parallax. Monocular cues include size: distant objects subtend smaller visual angles than near objects.
Read more about Depth Perception: Monocular Cues, Binocular Cues, Evolution, Depth Perception in Art, Disorders Affecting Depth Perception
Famous quotes containing the words depth and/or perception:
“Man tells his aspiration in his God; but in his demon he shows his depth of experience; and casts light into the cavern through which he worked his cause up to the cheerful day.”
—Margaret Fuller (1810–1850)
“No one has ever seen a Republican mass meeting that was devoid of the perception of the ludicrous.”
—Mark Twain [Samuel Langhorne Clemens] (1835–1910)