COMPARISON OF TWO VISION-TESTING DEVICES. A STUDY TO COMPARE VISUAL ACUITY AS MEASURED BY THE SIGHT-SCREENER AND THE SLOAN LETTER CHART.
D004864:Equipment and Supplies; D006306:Health Surveys; D006801:Humans; D014481:United States; D015351:Vision Screening; D014787:Vision Tests; D014792:Visual Acuity
EQUIPMENT AND SUPPLIES; HEALTH SURVEYS; UNITED STATES; VISION TESTS