Visual Acuity of Children [electronic resource] : United States.
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...
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Format: | Electronic eBook |
Language: | English |
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[S.l.] :
Distributed by ERIC Clearinghouse,
1970.
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Internet
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ED046650
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ED046650 | Available |