Whether you’re buying glasses for the kids that will need to withstand some knocks on the playground, glasses for playing sports where they might take a bump, or glasses that just need to stand up to tougher than normal treatment, high impact lenses might be a good idea.
This article will explain the benefits and drawbacks of different lens types to bear in mind when making your next purchase.
CR39 Plastic Lenses
Currently CR39 is the plastic most commonly used in lenses, its name is an abbreviation of Columbia Resin 39. This particular plastic was the 39th formulation of a thermal-cured material developed