With progressive lenses, peripheral distortion increases with add power. However, patients experience substantially less peripheral distortion with DEFINITY� Lenses compared to Conventional Progressive lenses. This is true at higher add powers In larger lenses, DEFINITY™ is the only progressive lens that features a unique GROUND VIEW ADVANTAGE ™ This GROUND VIEW ADVANTAGE™ minimizes distortion and flattens the field of vision Provides patients with clearer vision when looking down May help when walking downstairs.