Lens Interchangeable Lenses: Competivision: High contrast teal tinted lens. 33% Visible Light Transmission / 89% Infrared Light Transmission. TNS Gun: Neutral density gray lens with metallic silver mirror. Provides true color definition. Ideal for everyday all-purpose use. 13% Visible Light Transmission / 34% Infrared Light Transmission. Competivision lens on Bolle Tennis Sunglasses is the first and only lens technology created specifically for the sport of tennis -- with a patent to prove it. The concept is deceptively simple. By muting all light except optic yellow, the ball literally pops out of the background. How well does it work? The Bolle Tennis Sunglasses performed well enough to win the Tennis Week magazine Golden Acorn award for the best on-court product! Bolle Tennis Sunglasses have earns the right to be the official eyewear of the US Professional Tennis Association. Frame Matt Black Hydralon Frame: Nylon frame material is virtually indestructible and comfortably lightweight. Adjustable Wire-Core Temple Tips: Allow increased comfort and a unique fit for each wearer. UVA/UVB Protection UVA rays have been shown to penetrate the under layers of the skin, causing damage and contributing to the skin's aging. UVB rays, the sunburn rays, are the ones that cause the most concern. They can cause keratitis, which is similar to a sunburn on the eye, and have been linked to the development of cataracts. Sunglass lenses block 99% of harmful UV rays. Tennis Magazine & Tennis Buyers Guide Quotes: The teal colored Competivision lens casts a monochromatic shroud over everything but the color yellow. As a result the yellow ball comes at you like Godzilla in a 3-D movie. The stark contrast between background and tennis ball makes the Competivision lens idea for watching as well as playing tennis. In an informal test, 18 players of different skill levels rated the new glasses. Twelve testers claimed they could see the ball better and no tester said the sunglasses
