What is ISO/TR 21958 - Test methods to assess scratch and abrasion resistance of spectacle lenses about?
ISO/TR 21958 discusses ophthalmic optics. ISO/TR 21958 is an international standard that provides for review of the test methods used to assess scratch and abrasion resistance of spectacle lenses.
ISO/TR 21958 outlines the most used test methods considered in standardization work relating to scratch and abrasion resistance of plastic spectacle lenses along with their technical capacities and limitations. ISO/TR 21958 includes the ISO test method for assessment of claims for basic abrasion resistance in ISO 8980-5.
ISO/TR 21958 is intended to be of benefit to any future interest in ISO standardization on scratch and abrasion resistance of spectacle lenses.
Who is ISO/TR 21958 - Test methods to assess scratch and abrasion resistance of spectacle lenses for?
ISO/TR 21958 on test methods to assess scratch and abrasion resistance of spectacle lenses is useful for:
- Spectacle lenses manufacturers
- Test/medical laboratories
- Regulatory authorities
Why should you use ISO/TR 21958 - Test methods to assess scratch and abrasion resistance of spectacle lenses?
Ophthalmic optics is the science perception and physiology of the eye. It refers to the area within optics that describes the human eye and the measurements and correction of visual defects with visual aid. Spectacle lenses are vision eyewear consisting of clear lenses mounted of the frame that holds them in front of a person’s eyes.
ISO/TR 21958 guideline assists you with scratch mechanisms, different forms of damage, and assessing surface damage for spectacle lenses. ISO/TR 21958 assists you with steel wool test, tumble test, eraser test, Bayer test (oscillating abrasive grain test), nano scratch (diamond point loading device), Taber abrasion wheel test, minimum requirements for spectacle lens surfaces claimed to be abrasion-resistant for spectacle lenses.
The reviews of test methods assist you to standardize the quality of spectacle lenses that to ensure the safety of users throughout the product’s lifecycle.