Ophthalmics – Instruments – General-Purpose Clinical Visual Acuity Charts

Published by	Publication Date	Number of Pages
ANSI	2020	21

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Category: ANSI

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ANSI Z80.21 – Ophthalmics – Instruments – General-Purpose Clinical Visual Acuity Charts

ANSI Z80.21-2020 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 displays. It does not apply to special testing of visual acuity, e.g., low-vision, or reverse polarity (e.g., white optotype on a dark background).