ERIC Number: ED046650
Record Type: RIE
Publication Date: 1970-Feb
Reference Count: 0
Visual Acuity of Children: United States.
Health Services and Mental Health Administration (DHEW), Bethesda, MD.
National estimates based on the findings from the Health Examination Survey in 1963 to 1965 of uncorrected monocular and binocular visual-acuity levels of children were studied. A nationwide sample of 7,417 children was selected to represent the approximately 24 million noninstitutionalized American children between ages 6 and 11 years. Testing was done with the Master Ortho-Rater, a commercial instrument, on all children who could read letters. Those who could not read were tested using Landolt ring charts. Nearly three-fourths of the subjects were found to have at least "normal" (20/20 or better) binocular distance vision. The proportion with defective binocular distance vision showed a remarkably consistent increase with age. At age 6, less than 1 percent tested no better than 20/100, while by age 11, the percentage had increased to nearly 8. Boys were found to have significantly better binocular visual acuity at both distance and near than girls. Binocular vision tended to exceed monocular vision at both distance and near. Finally, closer agreement was found between binocular and better monocular acuity than between the acuities for the two eyes. Tables, figures, and references are given. (Author/DE)
Superintendent of Documents, U.S. Government Printing Office, Washington, D.C. 20402 ($0.45)
Publication Type: N/A
Education Level: N/A
Authoring Institution: Health Services and Mental Health Administration (DHEW), Bethesda, MD.