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.