Module%20III

Module%20III - Terminology Related to Visual Reception...

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Terminology Related to Visual Reception Nearsight or Near vision - What we see up close (15 - 18 inches from our eyes) Example - reading a book Farsight or Far vision - What we see at a distance (20 feet or more away) Example - taking notes from an overhead
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Definitions of Visual Impairments Partially sighted - Visual acuity is 20/70 in best eye with correction. Legally blind - Central visual acuity is 20/200 or less in best eye with correction or the widest diameter of the visual field subtends an angle no greater than 20 degrees.
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Terminology Related to Auditory Reception Decibels - Unit of measurement for the intensity of sound ( the loudness of a sound). Hertz - Unit of measurement for sound frequency (pitch of the sound). Frequency = The # of vibrations per second of a given sound wave
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Prelingual loss - Loss of hearing before spontaneous speech and language developed. Postlingual loss - Loss of hearing after spontaneous speech and language developed. Important: Age of onset and level of severity will affect educational programming.
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Refractive Errors Myopia (nearsighted) Hyperopia (farsighted) Astigmatism
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Muscle Function Defects Strabismus Hyperphoria Heterophoria Amblyopia Nystagmus
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This note was uploaded on 06/18/2011 for the course SPE 3000 taught by Professor Christyhooser,alicesontreach during the Spring '10 term at E. Illinois.

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Module%20III - Terminology Related to Visual Reception...

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