BLUE LIGHT FILTER - Heavily blocks 98.5% of all HEV blue light from digital screens like smartphones, tablets, gaming consoles, laptops, desktops, and TVs to prevent headaches, migraines, blurred vision, eye strain, and sleep disturbances. UNMATCHED QUALITY & STYLE - Offering superior quality and maximum protection, our frames are crafted from lightweight, durable, and flexible TR-90 plastic. Our polycarbonate lenses are scratch-resistant and shatterproof. Featuring classic designs that complement both men and women. TWO STRENGTH OPTIONS - 'Heavy duty' lenses block almost ALL (98.5%) HEV blue light in the 400-520nm spectrum and 100% from 400nm emitted by all digital screens. For those with less exposure or who need less coverage, our 'everyday' lenses block 30-50%. MORE RESTFUL SLEEP - Blue light affects your circadian rhythm, tricking your brain into thinking it's daytime and preventing a good night's sleep. Our computer glasses block this harmful light, helping you fall asleep faster and wake up feeling refreshed. AVOID EYE STRAIN - Headaches, blurred vision, difficulty focusing, and digital eye strain can be caused by hours of gaming or online scrolling. Our non-prescription glasses offer a safe and effective solution to block glare at school, work, or home.