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Visual perception

Visual perception is one of the senses, consisting of the ability to detect light and interpret (see) it as the perception known as sight or naked eye vision.

Vision has a specific sensory system, the visual system.

The major problem in visual perception is that what people see is not simply a translation of retinal stimuli (i.e., the image on the retina).

Thus people interested in perception have long struggled to explain what visual processing does to create what we actually see.

Note:   The above text is excerpted from the Wikipedia article "Visual perception", which has been released under the GNU Free Documentation License.
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