Visual system | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-05-07

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Visual_system


00:01:27 1 System overview
00:01:37 1.1 Mechanical
00:02:14 1.2 Neural
00:05:54 2 Structure
00:06:45 2.1 Eye
00:07:14 2.1.1 Retina
00:12:35 2.1.2 Photochemistry
00:13:48 2.2 Optic nerve
00:15:35 2.3 Optic chiasm
00:16:27 2.4 Optic tract
00:16:57 2.5 Lateral geniculate nucleus
00:19:07 2.6 Optic radiation
00:20:08 2.7 Visual cortex
00:21:42 2.8 Visual association cortex
00:24:29 3 Development
00:24:38 3.1 Infancy
00:25:39 3.2 Childhood and adolescence
00:26:30 3.3 Adulthood
00:27:34 4 Other functions
00:27:44 4.1 Balance
00:29:38 5 Clinical significance
00:32:24 6 Other animals
00:34:47 7 History



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SUMMARY
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The visual system is the part of the central nervous system which gives organisms the ability to process visual detail as sight, as well as enabling the formation of several non-image photo response functions. It detects and interprets information from visible light to build a representation of the surrounding environment. The visual system carries out a number of complex tasks, including the reception of light and the formation of monocular representations; the buildup of a nuclear 
binocular perception from a pair of two dimensional projections; the identification and categorization of visual objects; assessing distances to and between objects; and guiding body movements in relation to the objects seen. The psychological process of visual information is known as visual perception, a lack of which is called blindness.  Non-image forming visual functions, independent of visual perception, include the pupillary light reflex (PLR) and circadian photoentrainment.
This article mostly describes the visual system of mammals, humans in particular, although other "higher" animals have similar visual systems (see bird vision, vision in fish, mollusc eye, and reptile vision).