The Severely Visually Impaired Population as a Market for Sensory Aids and Services: Part One

Blindness and Services to the Blind in the United States (Cambridge, Mass.: OSTI Press, 1971), p. 35.

Robert Scott A. , The Making of Blind Men (New York: Russell Sage Foundation, 1969), p. 66. This figure does include both agencies and organizations and their branch offices. Excluding such branches, it is estimated that there are between 400 and 500 agencies and organizations.

“Estimated Total Cases and New Cases of Legal Blindness by State, 1970” (preliminary), National Society for the Prevention of Blindness New York.

Prevalence of Selected Impairments, United States, July 1963-June 1965 (U.S. Department of Health, Education, and Welfare, Public Health Service, National Center for Health Statistics Series 10, No. 48).

Statistical studies utilized for the profile include: Estimated Statistics on Blindness and Vision Problems. New York: National Society for the Prevention of Blindness, 1966.

Goldstein Hyman Blindness in the USA: Some Demographic Considerations (unpublished draft, 1971).

Goldstein Hyman The Demography and Causes of Blindness. New York: American Foundation for the Blind, 1968.

Graham Milton D. The Deaf-Blind: Some Studies and Suggestions for a National Program. New York: American Foundation for the Blind, 1970.

Josephson Eric “A Pilot Study of Visual Impairment.” In “A Pilot Study of Visual Impairment.” New York: American Foundation for the Blind, 1964.

Josephson Eric The Social Life of Blind People. New York: American Foundation for the Blind, 1968.

Statistics on Blindness in the Model Reporting Area 1968. U.S. Department of Health, Education, and Welfare, National Eye Institute.

Studies in the National Health Survey Series dealing with visual impairment (Series B-9, B-35, 10-46, 10-48, 10-53, 10-61, 11-1, 11-3, 11-25, 11-28, 11-30, 11-101, 12-2, 12-3, 12-8, 12-in preparation). U.S. Public Health Service, National Center for Health Statistics.

Trouern-Trend Kenneth Blindness in the United States (final summary report to the National Institute of Neurological Diseases and Blindness). Hartford, Conn.: Travelers Research Center, 1968.

In addition, numerous other studies, papers, and statistical sources were used.

“A person shall be considered legally blind whose central acuity does not exceed 20/200 in the better eye with correcting lenses [best correction] or whose visual acuity is greater that 20/200 but is accompanied by a limitation in the field of vision such that the widest diameter of the visual field subtends an angle of no greater than 20 degrees.”

Memorandum from Irvin P. Schloss, legislative analyst, American Foundation for the Blind, February 16, 1972.

Nelson Associates, A Survey of Reader Characteristics, Reading Interests, and Equipment Preferences: A Study of Circulation Systems in Selected Regional Libraries (New York: Nelson Associates, Inc., 1969), Table 74.