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There is disagreement as to whether or not this constitutes one, two or even three distinct senses. Some people make a distinction between "black and white" vision and the perception of colour, and others point out that rod vision uses different physical detectors on the retina from cone vision . Some argue that the perception of depth also constitutes a sense, but others argue that this is really cognition (that is, post-sensory) function derived from having stereoscopic vision (two eyes) and is not a sensory perception as such.

The eye is the light-sensitive organ that is the first component of the sensory system. The eye's retina performs the first stages of visual perception processing, with the remaining stages of visual perception occurring in the optic nerve and the visual cortex of the brain.

1 Types of visual perception

• Color vision
• Black and white vision

2 See also

• phi phenomenon
• optical illusions
• colorFor alternative meanings, see color (disambiguation). visual arts. Color (or colour is a sensation which (in humans) derives from the ability of the fine structure of the eye to distinguish three differently filtered analyses of a view. The perception of and color vision
• peripheral visionPeripheral vision is that part of vision that occurs at the edges of the field of view. Peripheral vision is weak in humans, especially at distinguishing color and shape. This is because the density of receptor cells on the retina is greatest at the cente
• flicker fusion and the persistence of visionAccording to the theory of persistence of vision the perceptual processes of the brain or the retina of the human eye retains an image for a split second. This theory supposedly accounts for the fact that when a motion picture flashes a series of progress
• saccadeA saccade is a fast movement of an eye, head, or other part of an animal's body or of a device. It can also be a fast shift in frequency of an emitted signal, or other such fast change. Its purpose can be illustrated by the human eye. We do not look at a
• color blindnessColor blindness is the inability to perceive differences between some or all colors that other people can distinguish. It is most often of genetic nature, but might also occur because of eye, nerve, or brain damage, or due to exposure to certain chemicals
• blindsightBlindsight is a condition superficially resembling blindness. In blindsight, people with damage to the visual cortex have residual visual sensitivity in a subjectively blind part of the visual field. The difference is that a person experiencing blindsight
• brightness and contrast
• binocular vision and depth perception
• consciousness and visual qualia
• optometry
• phosphenes
• pattern recognition and computer vision
• primary sensory areas
• neuroscience and cognitive science
• Visual perception in dreams
• optic flow