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Visual impairments are disorders in the function of the eyes that cannot be adequately corrected. Students who are blind or visually impaired vary considerably in their functional limitations. Some students have no vision; others are able to see large forms; others can see print if magnified; and still others have tunnel vision with no peripheral vision or the reverse. Furthermore, some students with visual impairments use Braille, and some have little or no knowledge of Braille. Most students use a variety of accommodations, technologies, and compensatory strategies.

Students who are blind or visually impaired are constantly challenged by classroom instructional strategies. Although they can easily hear lectures and discussions, it can be di