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About This Item

 

Full Description

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.
 

Document History

  1. ANSI Z80.21-2020


    Ophthalmics - Instruments - General-Purpose Clinical Visual Acuity Charts

    • Most Recent
  2. ANSI Z80.21-2010 (R2015)

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    Ophthalmics - Instruments - General-Purpose Clinical Visual Acuity Charts

    • Historical Version