You have a busy lifestyle, you need an intelligent lens that adjusts to the varying conditions you work in. Photochromic lenses change from light to dark depending on the amount of light they are exposed to. Ordinary spectacle lenses do not absorb all harmful ultraviolet light. Photochromic lenses protect your eyes by absorbing all harmful ultraviolet light. Modern photochromic lenses react quickly to light. So you only need one pair of glasses for all conditions. Look great - whatever the occasion! Ask for photochromic lenses.