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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. The psychological manifestation of visual information is known as visual perception.

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Wikipedia about Visual

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. The psychological manifestation of visual information is known as visual perception.

Introduction

s, 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 chiasma
  • The optic tract
  • The lateral geniculate body
  • The optic radiation
  • The visual cortex

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.

History

In the second half of the 19th century, many motifs of the nervous system were identified such as the neuron doctrine and brain localisation, which related to the neuron being the basic unit of the nervous system and functional localisation in the brain, respectively. These would become tenets of the fledgling neuroscience and would support further understanding of the visual system.

The notion that the cerebral cortex is divided into functionally distinct cortices now known to be responsible for capacities such as touch (somatosensory cortex), movement (motor cortex), and vision (visual cortex), was first proposed by Franz Joseph Gall in 1810. Evidence for functionally distinct areas of the brain (and, specifically, of the cerebral cortex) mounted throughout the 19th century with discoveries by Paul Broca of the language centre (1861), and Gustav Fritsch and Edouard Hitzig of the motor cortex (1871). Based on selective damage to parts of the brain and the functional effects this would produce (lesion studies), David Ferrier proposed that visual function was localised to the parietal lobe of the brain in 1876. In 1881, Hermann Munk more accurately located vision in the occipital lobe, where the primary visual cortex is now known to be.

Eye

The eye is a complex biological device. The functioning of a camera is often compared with the workings of the eye, mostly since both focus light from external objects in the visual field onto a light-sensitive medium. In the case of the camera, this medium is film or an electronic sensor; in the case of the eye, it is an array of visual receptors. With this simple geometrical similarity, based on the laws of optics, the eye functions as a transducer, as does a CCD camera.

Light entering the eye is refracted as it passes through the cornea. It then passes through the pupil (controlled by the iris) and is further refracted by the lens. The cornea and lens act together as a compound lens to project an inverted image onto the retina.

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MFC Programmer's SourceBook

Resource for Windows developers. Full of source code and tips for programming in Visual C++.www.codeguru.com/

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News about Visual

Spacing, Not Size, Matters In Visual Recognition, Researchers Find

Science DailyYou might think that the farthest distance at which you can hold a book and still read it quickly is determined by the size of the letters. However, neuroscientists have concluded that it's the spacing between letters, not their size, that matters. http://www.sciencedaily.com/releases/2008/09/080925144613.ht...

PicScout Continues to Guard Visual Content Copyright

Centre Daily TimesPicScout announced today their contract renewal for continued content monitoring with Getty Images, the world's leading creator and supplier of visual content. According to the contract, PicScout will remain the exclusive visual tracking service provider for detecting Getty Images' copyright infringement cases. The partnership began in early 2005 and has had a significant impact on copyright ...http://www.centredaily.com/business/technology/story/877619....

Oracle to buy Advanced Visual Technology

BizJournalsOracle Corp. said Wednesday it agreed to acquire Advanced Visual Technology Ltd., a provider of 3D visual macro space planning software for retailers. (ORCL)http://www.bizjournals.com/sanjose/stories/2008/09/29/daily4...

Oracle To Buy Advanced Visual Technology

Intelligent Enterprise MagazineThe retail software maker's products help store owners decide how to arrange stores and manage retail space for best product placement.http://www.intelligententerprise.com/showArticle.jhtml?artic...

MAC hosts visual and tactual art exhibit

The Hub The Middletown Arts Center (MAC) is hosting "Another View," an exhibit of artwork created by and for the blind or visually impaired. This multimedia show is a collection of paintings, sculptures, prints and mixed media work with an emphasis on tactual accessibility. http://hub.gmnews.com/news/2008/1002/arts_zest/027.html

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Fashionably frame or conceal windows

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A little work now will reward you with a colorful garden in spring

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Wifredo Lam's artwork on exhibit at Salvador Dali Museum

St. Petersburg TimesBut we can also suspect that it was a visual link to the Afro-Cuban heritage of his childhood, which mingled Christianity with the African-based Santeria religion. With the imprimatur of Picasso and his own exotic interpretation of modern art, he was ... http://www.tampabay.com/SearchForwardServlet.do?articleId=84...

Herald/SARAH MOORE KUSCHELL

Killeen Daily HeraldA self-proclaimed visual learner, Sutton said that he had difficulty in school when he was a student because work was either difficult or boring until he began illustrating his assignments. Regardless of whether he was writing for an English class or ... http://www.kdhnews.com/news/story.aspx?s=28527

Third time a charm for pilot

Salina JournalIf the weather is good enough that the pilot can see the airport, we advertise visual approaches," said Bruce Boyle, air traffic manager. The wind was out of the south and west, so the C-5 was approaching the runway from the north. The glide path ... http://www.saljournal.com/news/story/c5-landing-10-10-2008

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Visual Studio 2008 Express Editions

This site looks best with Silverlighthttp://www.microsoft.com/express
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Answers for Visual

zmneuro

Is a permit required to teach children visual arts in my home?

zmneuro
lost.in.love

How do you start career in visual merchandising?

lost.in.loveit would be very helpful to go to school for it. If you're going into business, why do you want to do visual merchandising?
AFZ

What is the visual acuity of a person having -6 number ?

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kenon_2007

Does visual approach cancel IFR flight plan?

kenon_2007You are correct on the course and altitude but unless you cancel you IFR flight plan, you are still flying under IFR flight rules. This is in case during your visual approach you find that you can no...
Suzzane P

How can a visual artist become a celebrity?

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