Optical grade CR39 lenses. Superior hard coat for anti-scratch durability. Anti-reflective coatings to mitigate reflections and glare. Super hydro-phobic and oleo-phobic coatings for anti-smudge. Handcrafted acetate designs utilizing state of the art CNC and finishing for fit, function, and durability. All Caddis readers block blue light. The included HEV coating blocks harmful high energy light screens emit.