VC ANSI Z80.21-2020

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General - Purpose Clinical Visual Acuity Charts

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VC ANSI Z80.21-2020

General - Purpose Clinical Visual Acuity Charts

PUBLISH DATE 2020
VC ANSI Z80.21-2020
This standard applies to displays of optotypes for all clinical visual acuity measurement systems that use recognition of optotypes and that are designed for general use including optotypes printed on opaque media, those intended for transillumination, electronically generated or projected displayspt It does not apply to special testing of visual acuity, eptgpt, low-vision, or reverse polarity (eptgpt, white optotype on a dark background)pt
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