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This report from the National Center for Health Statistics contains information on the use of corrective lenses by persons 3 years of age and over. Data were collected during 1971 in the Health Interview Survey, a continuing household interview survey of a probability sample representative of the civilian, noninstitutionalized population of the United States. An earlier report from the Health Interview Survey (Vital and Health Statistics, Series 10, No. 53) presented data on corrective lenses based on the July 1965 through June 1966 survey.
The term "corrective lenses" is limited to visual aids worn to correct or improve vision and therefore excludes sunglasses worn only to filter light, safety glasses worn only for protection of the eyes, hand magnifying glasses, and other such devices. However, if the safety glasses are worn also for correction or improvement of vision, they are considered corrective lenses, as are prescription glasses.
Approximately 94 million
Alford BR. Characteristics of Persons With Corrective Lenses, United States—1971 (Vital and Health Statistics, Series 10, No. 93, DHEW Publication No. HRA 75-1520). Arch Ophthalmol. 1975;93(5):394. doi:10.1001/archopht.1975.01010020406026
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