Specifications:These lenses have an SPH Range+/-4.25 to +/-6.75 CYL +/-2.25 to +/-3.00

Material:Lenses are crafted usingCR-39 (Columbia Resin 39),a plastic polymercommonly used in the manufacture of eyeglass lenses with UV400 Coating that meets ANSI standards. The surface of this lensis resistant to scratches, most solvents, and everyday wear.

Coating:AR/HMC/AS/UV400

Photochromic lenses are eyeglass lenses that are clear (or nearly clear) indoors and darken automatically when exposed to sunlight.An added benefit of photochromic lenses is that they shield your eyes from 100 percent of the sun’s harmful UVA and UVB rays.It’s a good idea to consider photochromic lenses for children’s eyewear as well as for eyeglasses for adultsBecause a person’s lifetime exposure to sunlight and UV radiation has been associated withcataractslater in life.

Progressive lensesdigital state of the art technologicalimprovements have created a smooth and consistent transition between differing lens strengths within the lens itself. Also known as multifocal or varifocal lenses, they offer all of the improvements of the old out moded bi- or trifocal lenses such as a 20% wider scope of view that is undistorted, a uniquevisual correction design inthese lensesis created on the back of the lenses rather than on the front. This allowselimination ofthe ‘key hole effect’ common tostandardprogressive lenses.

For accurate ordering of lenses please see the How to Choose Lenses Indexcharts in this product page. If you require any additional assistance please contact us via our customer service email at [email protected].