Anti-UV & Anti-Blue Rays Light Blocking Photochromic Glasses Filter Computer

Function: filter blue light and photochromic,7-layer anti-reflective coating to reflect and filter blue light,PHOTOCHROMIC GLASSES: Cut UV 400 (ultraviolet ray), reduce eyestrain and sleep better.High light transmittance with no noticeable yellow tint to prevent color distortion, minimize glare from digital screens.BLUELIGHT BLOCKER & REPLACEABLE LENS: Reduce symptoms of eyestrain during prolonged computer exposure. These frames are best used as indoor lenses for long hours of computer use in order to maintain natural sleep patterns and eye production. The original non prescription lenses can be replaced with progressive lenses at any stores.