DIMENSION:Lens width:53MM,Bridge width:18MM,Arm length:140MM MATERIAL: This frame has the advantages of super lightness, abrasion resistance, low friction coefficient and so on. It can effectively protect our eyes and faces from the damage caused by the fracture and friction of the eyeglasses frame in the movement. Besides, it is metal hinge that is more stable BLUE LIGHT BLOCKING LENS(WITH YELLOW TINT) can effectively block 100% harmful UV rays and relieve our eye fatigue especially when watching TV and looking at computer DESIGN: A successful contrast between a retro square shape and futuristic clear finish, this frame is sure to turn heads wherever you go QUALITY ASSURANCE: 90 days quality guarantee. If there are any problems, please contact us in timeColor: Blue Package Quantity: 1 Size: Lens width:53MM,Bridge width:18MM,Arm length:140MM Style: retroMinimize headache Do you suffer headaches from long time screen time? Livho blue light blocking glasses will supercharge your health by blocking detrimental blue light while letting in all other beneficial light. Better Life Exposure to high rate blue light will impact our sense of circadian rhythms and wreck our internal rock, then cause insomnia. Wearing livho blue light filter glasses will improve your sleep, help you sleep better and feel good everyday Anti eye fatigue Long time exposure to blue light would lead to digital eye fatigue. Wearing your livho glasses, no more tired eyes. Reduce eye strain and sensitivity to light when facing digital screens. Great for office workers or anyone who has to look at screen all day.