BLUE LIGHT BLOCKER LEN-:Dollger's anti-blue light lenses can filter 90% of harmful blue light, which comes from computer / mobile / TV blue radiation. Protect your eyes in time, add a protective umbrella to your eyes | HIGH QUALITY MATERIALS-This vintage square blue light blocking glasses is made of reinforced Alloy metal frame, soft silicon nose pads, durable metal hinge, all the details ensure you a perfect performance. | REDUCE EYESTRAIN & BETTER SLEEP-Blocks blue light radiation damage from computer / tablet / mobile screens, thereby protecting your eyesight and reducing eye fatigue. Provide a better sleep for you staying up late | Oversized Frame -Lens Width: 60mm( 2.36inches) | Lens Height: 55mm( 2.16inches) | Temple Length: 143 mm( 5.63inches) | Nose Bridge: 15 mm( 0.59inches).Fits fashion and shows small face. | QUALITY PROMISE- 100% risk free to try, unsatisfied glasses can be refunded within 60 days of receiving.In case of any problem happening, just contact us without any hesitation until you are satisfied.