Historical
ANSI Z80.21-1992 (R2004)
Ophthalmics - Instruments - General-Purpose Clinical Visual Acuity Charts
Applies to all clinical visual acuity measurement systems using recognition of high contrast optotypes and which are designed for general use. It does not apply to special testing of visual acuity.
Content Provider
VC (ASC Z80): Vision Council [vc (asc z80)]