Cats will do as they please. Show off your reverence for retro with this rounded cat-eye silhouette. The Cheetah's youthful energy is elevated by an aura of glamour, making it iconic from the get go. A forever-young look that strikes the ideal balance of classic form and function. Frame Measurements 53-20-140. 6 Base Lens Curvature.Carbonic TLTEngineered to be the most impact resistant lens material in the world. Carbonic TLT lenses are optically corrected to maximize visual clarity and object definition. TLT Optics: Tapered Lens Technology corrects light distortion for true optical clarity.