Ophthalmic optics - Uncut finished spectacle lenses - Part 3: Transmittance specifications and test methods
STANDARD published on 1.1.2023
Designation standards: ČSN EN ISO 8980-3
Classification mark: 195105
Catalog number: 516032
Publication date standards: 1.1.2023
The number of pages: 48
Approximate weight : 144 g (0.32 lbs)
Country: Czech technical standard
Category: Technical standards ČSN
This document specifies requirements for the transmittance properties of uncut and unmounted finished spectacle lenses, including attenuation of solar radiation.
This document is not applicable to
- spectacle lenses having specific transmittance or absorption characteristics prescribed for medical reasons,
- products to which specific personal protective equipment transmittance standards apply, and
- products intended for direct observation of the sun, such as for solar-eclipse viewing.
NOTE 1 - By reference to ISO 21987 and ISO 14889, this document also applies to lenses mounted in spectacles.
NOTE 2 - Optical and geometric requirements are given for uncut finished spectacle lenses in ISO 8980-1 and ISO 8980-2, and for mounted lenses, in ISO 21987