ABSTRACT
This chapter considers the main brain areas involved in vision and the functions served by each area. Much of the posterior half of the cortex is devoted to vision, and visual processing occurs in approximately 25 distinct brain areas. There are two types of visual receptor cells in the retina of the eye: cones and rods. Cones are used for colour vision and sharpness of vision. The chapter presents the two visual systems: perception and action. There are two differences assumed theoretically between the two visual systems. First, processing in the dorsal stream is faster than in the ventral stream. Second, processing in the ventral stream depends more on input from the fovea than does dorsal processing. Depth perception depends heavily on numerous visual and other cues. There are numerous monocular cues to depth as well as oculomotor and binocular cues. Information from different depth cues is typically combined to produce accurate depth perception.
