Incorporate several layers of mineral deposits, which usually are applied
to both lens surfaces. The various manufacturers and Anti Reflection coating companies
determine the number of layers applied to each surface for their own brands.
Help reduce glare for clearer viewing, which means less eyestrain and fatigue for
the wearer.
Also improves eye contact by eliminating reflections from the lens surface
Also reduce the appearance of the concentric ring effect on high-minus lenses.
Cr39 plastic lenses can scratch quite easily if not treated carefully, so a much harder plastic coating is added to the surface to help reduce scratching.
We do not charge for scratch resistant coating on any lens we supply.