OptiSafe® lens dye packets have been formulated by Phantom Research Laboratories, Inc. after several years of research and development. They are the most advanced lens dyes available today, providing the most consistent, uniform colors in the least amount of time. The molecular composition of the dyes allow for rapid penetration into the lens matrix, bonding to the lens and providing an excellent resistance to fading. Plastic CR-39™ (coated and uncoated), Hi-Index, and Polycarbonate lenses can be successfully tinted with OptiSafe® lens dyes.