A lens treatment is a special additive that either bonds with the lens, or is built into the lens during the lens manufacturing process. Lens treatments are available as individual additions to lenses, and are also commonly bundled into single lens products for convenience and maximum benefit to your eyes.
Common Lens Coatings & Treatments:
The UV rays in sunlight can be harmful to the eyes. Lenses that block 100% UV help to ward off various eye conditions and damage. Most premium lenses such as polycarbonate, high-index and Transitions include UV protection as part of the lens itself.
Scratches on lenses are distracting, plain and simple. And they can interfere with lens performance. Scratch-resistant treatments imbued into the lens surface toughen up the lenses making them more durable. Most premium lenses include scratch resistance coatings.
For fashion, comfort and clarity, anti-reflective treatments are the way to go. They make the lens nearly invisible and cut glare from headlights, computer screens and harsh lighting. By far, the best and most widely prescribed coating of this type is the CRIZAL coating by Essilor. Highly advertised on the Internet, so-called "blue-blockers" have been determined to be non-beneficial by the American Optometric Association and The American Academy of Ophthalmology.