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ⓘ Visual system. 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 re ..




Visual system
                                     

ⓘ Visual system

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 constructing a three dimensional world from a two dimensional projection of that world. The psychological manifestation of visual information is known as visual perception.

                                     

1. Introduction

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 optic chiasma
  • The visual association cortex
  • The visual cortex
  • The optic radiation
  • The eye, especially the retina
  • The optic tract
  • The optic nerve
  • The lateral geniculate nucleus
  • The optic tectum superior colliculus

Different species are able to see different parts of the light spectrum; for example, bees can see into the ultraviolet, while pit vipers can accurately target prey with their infrared imaging sensors.

                                     

2. Other websites

  • Journal of Vision - An online, open access journal of vision science.
  • VisionScience.com - An online resource for researchers in vision science.
  • "Webvision: The Organization of the Retina and Visual System" - John Moran Eye Center at University of Utah