Protect Your Eyes - High Energy Blue Light emitted by electronic devices such as computers, tablets, and smartphones have shown to increase the risk of accumulated damage to the retina, cataracts, sleep disorders and macular degeneration. Block Blue Light - Block 65% of harmful blue light, 100% of UV. Prevent short-term and long-term damage like macular degeneration, cataracts, and the reduction of melatonin production. Sleep Better - Block blue light and reduce eye strain that affects your bodies circadian rhythms and prevents healthy restorative restful sleep you need to perform daily and prevent health issues Reduce Eye Strain - minimize headaches, dry eye and eye fatigue with added amber lens contrast, anti reflective coatings and patented focusing power 0.20 mag GUNNAR produces the only blue light blocking computer and gaming glasses with Patented Lens (#9417460) Technology that is recommended by doctors to protect and enhance your vision. GUNNAR developed the Blue Light Protection Factor, telling you exactly how much of the peak blue light spectrum (450nm) we're blocking. Not all blue light glasses in the market protects you from the strongest high-energy visible light. GUNNAR improves performance while viewing tablets, smartphones, TV & computers to reduce digital eye strain, fatigue and headaches.