Hi-index or slim lenses - If you have a strong prescription you needn't have thick lenses. Photochromic Lenses - Have one pair of lenses for indoor and outdoor use that darken automatically in sunlight. Available in glass or plastic and most lens types Varifocal lenses - A multifocal lens without the ugly lines associated with bifocals. Particularly useful for computer use. Anti-reflection coating cuts out unsightly reflections on the surface of the lens. Also good for night driving. Tints - Colors to suit every taste. Light cosmetic tints or dark sunspec. tints. Scratch resistant coating as added protection for plastic lenses.