Visual Perception Impairment November 7, 2008
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Vision Problems ? Looking for a way to improve your eyesight
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Everyday activities are effected by how well we see. If vision is impaired, then these daily activities may become more difficult. Often visual problems are only thought of as visual loss or blindness. There are additional visual components that may effect everyday tasks.
These include such things as:
* Acuity (ability to see clearly)
* Scanning / Pursuits (ability to move eyes side to side, up and down)
* Depth Perception
* Contrast Sensitivity
* Double Vision (ability to see singular items verses seeing double)
* Peripheral Vision
* Ability of the eyes to work together
* Visual Field (ability to see things all around you)
* Color Perception (ability to see colors)
wwrc.virginia.gov/occupationaltherapy.htm
An Intro Into Visual System November 7, 2008
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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.
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 chiasma
* The optic tract
* The lateral geniculate body
* The optic radiation
* The visual cortex
Vision September 27, 2008
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photo credit: Dario Sanches
Sometimes we forget the importance of our eyes. We have two eyes; imagine if we would lose the use one eye? That would be devastating for us. It would be very scary to know that if something happened to the remaining eye we would be blind. (more…)
