PSYC305 Chapter 9 Notes

PSYC305 Chapter 9 Notes - disabiltity Causes of visual...

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Chapter 9- Students with Blindness or Low Vision Thru cornea, pupil, lens to retina. Rod is finer than cones. Cones are fatter and could see color. Blind spot in the optic nerve. Educational Definition: - Blind: Unable to read print- Must use Braille or aural methods - Low vision (partially sighted)- Able to read print, regular or magnified Eye specialists: - Ophthalmologist - Optometrist - Optician The most common problems of eye are due to: - Myopia (nearsightedness)- Blurred vision of distant objects - Hyperopia (farsightedness)- Blurred vision of near objects - Astigmatism (blurred vision)- Part of vision blurred by irregular thickness in cornea or lens Conditions of cornea, iris, and lens: - Aniridia: lack of color - Cataract: - Glaucoma: Condition of eye muscle: - Strabismus: one eye muscle is weak - Nystagmus: twitchy eye *Patch the good eye to force the other eye to stable what you are suppose to look at* - Fewer than 2 children in 1000 have visual impairment:
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Almost half of school age children with visual impairments also have another
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Unformatted text preview: disabiltity- Causes of visual impairments: • Refractive errors: myopia • Structural impairment: cataracts, glaucoma, mystagmus, strabismus • Coritcal visual impairments: suspected damage to part of the brain… Types and causes of visual impairment:-Reinitis pigmentosa (RP): a gradual degeneration of the retinal the first sympotom usually difficulty seeing at night, followed by loss of peripheral vision; the most common of all inherited Guide Dogs:-About 7,250 people in the US use GD • Less than 4% of adults who are legally blind-GD have a lot to offer their human partners • They are specially trained to act as mobility aids for blind and visually impaired individuals Orientation:-Long cane is the device most widely used by visually impairment individuals Aids: Braille:-A system of reading and writing in which letters, words, numbers are made from combinations of six raised dots. Tactile aids and manipulative Computer technological aids for reading p…...
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This note was uploaded on 09/04/2010 for the course PSYC 305 taught by Professor Freiberg during the Spring '10 term at UMBC.

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PSYC305 Chapter 9 Notes - disabiltity Causes of visual...

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