The most sport specific technology ever invented, Bolle's patented CompetiVision TM is the only lens youÕll ever need for tennis. CompetiVision lenses act like filters, carefully muting all colors in the spectrum except for optic yellow. The result: a tennis ball that pops out of the background. That's why the lenses are the official eyewear of the US Professional Tennis Association. Available with a variety of styles, many of which feature interchangeable lenses for 100% UVA and UVB protection on and off the court.