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ANSI Z80.21-2010 (R2015)


Ophthalmics - Instruments - General-Purpose Clinical Visual Acuity Charts

This standard applies to displays of optotypes for all clinical visual acuity measurement systems thatuse recognition of high-contrast optotypes and that are designed for general use including optotypesprinted on opaque media, those intended for transillumination, electronically generated or projecteddisplays

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