Test charts for distance preferred for low-vision
Fonda, G.
Annals of Ophthalmology 19(5): 178-180
1987
ISSN/ISBN: 0003-4886 PMID: 3592477 Document Number: 302771
Two wall test charts with Snellen letters on both sides have been designed for the purpose of testing vision accurately, especially for the patient with low vision. Visual designations of 20/160 (6/48) and 20/125 (6/37.5) are included on the chart. This makes each line 26% larger. Sloan letters are used and arranged so that each line is of equal difficulty.
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