Behind the eyes, information derived from left and right visual fields of either eye is collected together and passes back to the opposite cerebral hemisphere, which it reaches after one further relay. In the cortex are several areas concerned with visual perception and related phenomena. The basic receptor information is coded by nerve interconnections at the various relays in such a way that information about spatial interrelationships is derived with increasing specificity as higher levels are reached. Interference with any of the levels of the visual pathway may lead to visual symptoms and potentially to blindness.
Related entries• averted vision
• binocular vision
Related category• ANATOMY AND PHYSIOLOGY
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