The Optics Common Lens Coatings & Treatments: UV Protection 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. Scratch Resistant 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. Anti-Reflective 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.