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ANSI Z80.20-1998
M00002718
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ANSI Z80.20-1998 Ophthalmics: Contact Lenses - Standard Terminology, Tolerances, Measurements and Physicochemical Properties (revision, redesignation and consolidation of ANSI Z80.2-1989, ANSI Z80.6-1983, and ANSI Z80.8-1986)
standard by American National Standards Institute, 01/01/1998
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Full Description
Applies to contact lenses that have prescribed refractive and/or prismatic powers, which are devices worn over the front surface of the eye in contact with the preocular tear film. The standard covers rigid (hard) intracorneal and haptic (scleral) contact lenses, as well as flexible paralimbal contact lenses.