visual impaired!

visual impaired

Comprehensive Analysis

1) "Visual" -- As to visual impaired 1vi·su·al Pronunciation: 'vi-zh&-w&l, -zh&l; 'vizh-w&l Function: adjective Etymology: Middle English, from Late Latin visualis, from Latin visus sight, from vidEre to see 1 : of, relating to, or used in vision <visual organs> 2 : attained or maintained by sight <visual impressions> 3 : VISIBLE <visual objects> 4 : producing mental images : VIVID 5 : done or executed by sight only <visual navigation> 6 : of, relating to, or employing visual aids - vi·su·al·ly /'vi-zh&-w&-lE, -zh&-lE; 'vizh-w&-lE/ adverb Pronunciation Symbols

Neuroscience Portal

The visual system is the part of the nervous system which allows organisms to see. It interprets the information from visible light to build a representation of the world surrounding the body. The visual system has the complex task of (re)constructing a three dimensional world from a two dimensional projection of that world. Note that different species are able to see different parts of the light spectrum; for example, some can see into the ultraviolet, while others can see into the infrared.

This organ system must solve the correspondence problem, as well as deal with the complexities of binocular vision. The psychological manifestation of visual information is known as visual perception.

This article mostly describes the visual system of mammals, although other "higher" animals have similar visual systems. In this case, the visual system consists of:

• The eye, especially the retina
• The optic nerve
• The optic chiasm
• The optic tract
• The lateral geniculate nucleus
• The optic radiation
• The visual cortex