Transition lenses automatically adapt to changing light conditions. The lenses respond to the surrounding light levels and they intelligently change from a clear lens indoors to a dark lens outdoors and back again. Transitions Signature GEN 8 is the latest innervation in photochromatic lenses. These lenses return to clear faster than ever before and the tint is substantially darker when outside. These lenses are available in the staple 3 iconic colours and 4 vibrant style colours.