30 DAYS - We promise 100% money back within 30 days for any reasons of dissatisfaction with prompt customer service. Buy with confidence. COMPUTER GLASSES - Durable & stylish: These blue light blocking eye glasses show off a classic-looking frame. Wear these fake glasses while you are at work or while you play your video games at home. BLUE BLOCKER GLASSES - Metarial and Design: Light weight plastic frame with anti-scrached Polycarbonate lens,duarable injected hinge provide you comfort fit.Oversized square design shine you style out. Best Gift for your eyes' health!. BLUE LIGHT BLOCKING GLASSES - Relieve Eye Strain and Protection Your Eyes: Reduce eye fatigue,headache, blurry vision caused long time exposion to blue light ray, protect eyes from UV and Glare. BLUE LIGHT GLASSES - Anti blue light lens: Filter high level blue light from digital screen of computer, phone and TV,maintain HD clear vision with less color distortion.