ANSI Z80.21:2020
Current
The latest, up-to-date edition.
Ophthalmics - Instruments - General-Purpose Clinical Visual Acuity Charts
Hardcopy , PDF
English
12-05-2020
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 displays.
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