NEW VISUAL-ACUITY CHARTS FOR CLINICAL RESEARCH
NEW VISUAL-ACUITY CHARTS FOR CLINICAL RESEARCH
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DOI:
10.1016/0002-9394(82)90197-0
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发表时间:
1982-01-01
影响因子:
4.2
通讯作者:
BAILEY, I
中科院分区:
文献类型:
--
作者:
FERRIS, FL;KASSOFF, A;BAILEY, I
Three new visual acuity charts facilitate quantitative use of visual acuity test results. The charts have high-contrast lettering on washable white polystyrene. Each line has five Sloan letters; the lines are of equal difficulty, and there is a geometric progression in letter size from line to line. This provides a similar task for each line on the chart with the letter size being the only variable. Charts with different letter sequences are used for testing right and left eyes.