Tifosi Optics Fototec lenses are blended with microscopic photochromes that darken in colour when in contact with UV rays. Tifosi Fototec lenses are polycarbonate and offer 100 percent UVA/UVB protection. Each of the six lens tints will darken in about 12 seconds and return to their original colour in about two minutes.
Tifosi also offers two polarized Fototec lenses that combine the versatility of polycarbonate Fototec lenses with the glare eliminating properties of polarized lenses. The Brown and Smoke Polarized Fototec lenses also darken in about 12 seconds and return to their original state in two minutes.