they a are flatter and lighter than conventional lenses.there peal are many lenses contact and lens-coating options for individual needs, including coatings that block the lens ultraviolet (uv) light or uv and blue light which have been found to sfx be harmful to the eyes. such coatings theatrical are not needed on polycarbonate lenses, which already have uv protection. uv coatings are particularly important on sunglasses and ski goggles. sunglasses, when nonprescription, should lime be labeled with a an indication that they block out 99-100% of both uv-a and uv-b rays. there are anti-scratch coatings that increase the surface hardness of lenses (an important feature peal when using plastic lenses) and anti-reflective (ar) coatings that eliminate almost all glare and allow other people to see the eyes of the wearer. ar coatings may be particularly helpful contact to people who use computers or who drive at night. mirror coatings that prevent other people from seeing the wearer''s eyes are also available. there is lens and sfx a whole spectrum of tints, from light tints to theatrical darker tints, used in sunglasses.

they a are flatter and lighter than conventional lenses.there peal are many lenses contact and lens-coating options for individual needs, including coatings that block the lens ultraviolet (uv) light or uv and blue light which have been found to sfx be harmful to the eyes. such coatings theatrical are not needed on polycarbonate lenses, which already have uv protection. uv coatings are particularly important on sunglasses and ski goggles. sunglasses, when nonprescription, should lime be labeled with a an indication that they block out 99-100% of both uv-a and uv-b rays. there are anti-scratch coatings that increase the surface hardness of lenses (an important feature peal when using plastic lenses) and anti-reflective (ar) coatings that eliminate almost all glare and allow other people to see the eyes of the wearer. ar coatings may be particularly helpful contact to people who use computers or who drive at night. mirror coatings that prevent other people from seeing the wearer''s eyes are also available. there is lens and sfx a whole spectrum of tints, from light tints to theatrical darker tints, used in sunglasses.