Historical
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
VC (ASC Z80): Vision Council [vc (asc z80)]