The Brain and Vision

The brain

After light passes through the cornea it then moves through the lens to the retina. Signals from the retina are processed in a hierarchical fashion by different parts of the brain, such as the lateral geniculate nucleus, and the primary and secondary visual cortex of the brain. The visual dorsal stream (green) and ventral stream (purple) are shown. Much of the human cerebral cortex is involved in vision. The visual dorsal stream (green) and ventral stream (purple) are shown. Much of the human cerebral cortex is involved in vision.

[edit] Theoretical perspectives in the study of visual perception

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.