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Download full textRoberts, Jean – 1973
A validation study of the vision test battery used in the Health Examination Survey of 1966-1970 was conducted among 210 youths 12-17 years-old who had been part of the larger survey. The study was designed to discover the degree of correspondence between survey test results and clinical examination by an opthalmologist in determining the…
Descriptors: Adolescents, Exceptional Child Research, Incidence, Partial Vision
Peer reviewed
Direct linkvan den Broek, Ellen G. C.; Janssen, C. G. C.; van Ramshorst, T.; Deen, L. – Journal of Intellectual Disability Research, 2006
Background: The prevalence of visual impairments in people with severe and profound multiple disabilities (SPMD) is the subject of considerable debate and is difficult to assess. Methods: In a typical Dutch care organization, all clients with SPMD (n = 76) participated in the study and specific instruments adapted to these clients (requiring a…
Descriptors: Visual Impairments, Incidence, Multiple Disabilities, Visual Acuity
