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ANSI Z80.21-2020
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ANSI Z80.21-2020 Ophthalmics - Instruments - General-Purpose Clinical Visual Acuity Charts
standard by American National Standards Institute, 2020
Full Description
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).
M00001452
2021-03-02
New product
ANSI Z80.21-2020 Ophthalmics - Instruments - General-Purpose Clinical Visual Acuity Charts
standard by American National Standards Institute, 2020