MIAMI--BPI (Brain Power Inc.) is introducing the UV Activator, a dual-purpose device that can be used to visually demonstrate the effectiveness of UV blocking lenses and activate photochromic lenses with ultraviolet light of intensity similar to that in sunlight.

The compact unit measures 4 inches high by 6 inches wide by 4 inches deep. It features a UV light source that is discreetly baffled inside a black metal box, placing it away from user’s direct view. It illuminates a white target that fluoresces brightly in the presence of UV light. A UV-blocking lens will leave a dark shadow on the fluorescent target. Photochromic lenses will be darkened by the UV light at much the same rate as they would be by natural sunlight. Lenses can be evaluated while still in the frames. ■