Serengeti Vento Sunglasses, Shiny Silver with Drivers Lens Base Curve: 8Rx Temple Length: 125mm/Spring Hinges Lens Size: 60 x 35.1 x 63.2mm The Sport Classic Frame give style and confidence. The Drivers brown-colored lens is ideal for driving, because it adjusts to the changing light conditions that are inevitably encountered on the road. 24% Transmittance lightened lens/9% transmittance darkend lens.