New visual acuity charts for clinical research

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....

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Bibliographic Details
Published in:	American journal of ophthalmology Vol. 94; no. 1; p. 91
Main Authors:	Ferris, 3rd, F L, Kassoff, A, Bresnick, G H, Bailey, I
Format:	Journal Article
Language:	English
Published:	United States 01-07-1982
Subjects:	Humans Vision Tests - instrumentation Visual Acuity
Online Access:	Get more information
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Description
Summary:	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.
ISSN:	0002-9394
DOI:	10.1016/0002-9394(82)90197-0