PD ISO/TR 21958:2019
Ophthalmic optics. Review of the test methods used to assess scratch and abrasion resistance of spectacle lenses
|Standard number:||PD ISO/TR 21958:2019|
|ISBN:||978 0 539 01129 6|
- 11.040.70 Ophthalmic equipment
This document describes the most commonly used test methods considered in standardization work relating to scratch and abrasion resistance of plastic spectacle lenses along with their technical capacities and limitations. It includes the ISOÃ?Â test method for assessment of claims for basic abrasion resistance in ISOÃ?Â 8980-5.
This document is intended to be of benefit to any future interest in ISOÃ?Â standardization on scratch and abrasion resistance of spectacle lenses.