Barnes Blue Light Readers by Caddis +1.25 Included: Blue light blocking (HEV coating) Optical grade CR39 lens 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 All Caddis readers block blue light. Our included HEV coating blocks harmful high energy light screens emit. We're pro cool shit you're doing on your screens. We're anti eye strain, headaches & disrupted sleep. Block. Blue. Light. Now.