Visual acuity of youths 12-17 years. United States.
D000293:Adolescent; D000367:Age Factors; D002648:Child; D005260:Female; D006306:Health Surveys; D006801:Humans; D007182:Income; D008297:Male; D044469:Racial Groups; D012111:Residence Characteristics; D012737:Sex Factors; D013223:Statistics as Topic; D014481:United States; D014792:Visual Acuity