Ray-Ban RB5433 Optics Change eyeglasses come in a stunning waves brown color, featuring a pillow-shaped frame. The lightweight acetate material ensures comfort for all-day wear. The polished finish and soft pillow shape of these frames are guaranteed to turn heads wherever you go. The light-responsive frame is made with photochromic dyes that activate in seconds under UV. The pigments change to reveal unique markings, and as the light gets stronger, so does the pattern.