EYEKEPPER, a brand of professional, affordable blue light blocking glasses that aims to help you reduce eye strain to see the digital screen. Get unique computer glasses from EYEKEPPER and enjoy the reading of eyesight benefits and stylish features.Per the Occupational Safety & Health Administration: The preferred viewing distance for VDTs ranges between 18 and 24 inches (45.72 and 60.96 centimeters, respectively)Filters 100% of the most damaging low-level blue and nearly 90% high energy visible light from tablets, phones, TV, computers and more.Our lenses code is BB40 for the EYEKEPPER blue light block glasses. WHY CHOOSE EYEKEPPER ? √ More professional blue ray blocking -- Glasses lens are designed using the American HEV-Adsorb substrate absorption technology.It can absorb high-energy blue light. √ Stronger UV protection -- Anti-Blu-ray Lenses utilize special U.S. substrate processing technology to protect the eyes from ultraviolet radiation and block UV420 not just UV400. WE ARE DIFFERENT! Data for Eyekepper's BB40 40% blue light blocking for wavelength 395nm-500nm Use to test wavelength is 450nmThe data of left is visiable light,the data of middle is blue light remaining,the data of right is UV light remaining.EYEKEPPER glasses are specially designed to filter out a portion of harmful blue light. LET EYEKEPPER PROTECT YOUR EYES! Color Distortion Almost no color difference.The premium features of EYEKEPPER lenses, make screen time more comfortable and help eliminate symptoms of digital eyestrain. Spectrum Analyzer Amber Tinted with 12 Layer Coating of Eyekepper Cut 100% of UV420,UVA and UVB Note To avoid damage the violet block glasses, never clean the glasses with thefollowing: paper towelsclothingalcoholhousehold detergentssoaps Eyekepper Cat Eye Women Oversized Blue Blocking Glasses Anti Digital Glare Eyekepper Ladies Oversized Square Computer Eyeglasses Eyekepper Blue Light Filter Readers UV420 Protection Oversized Square Eyeglasses Eyekepper Round Rimless Computer Reading Glasses Men Women Eyekepper Oversized Anti UV Ray Digital Glare Reading Glasses For Women Blue Blocking Glasses with Orange Filter Lens for Sleeping Women Buying Options Add to Cart Buying Options Add to Cart Buying Options Buying Options Customer Reviews — 4.8 out of 5 stars 6 — 3.8 out of 5 stars 181 5.0 out of 5 stars 1 — Price — no data $12.99$12.99 — no data $17.99$17.99 — no data — no data