DIMENSIONS:Overall Width: 130mmTemple Length: 135mmLens Width: 48mmLens Height: 37mmFrame Height: 41mmNose bridge width: 16mmSpring hinge: YesLenses: AsphericHead size: Narrow to Wider.Rx-able frameABOUT US8-in-1 Coating TechnologyComputer Glasses lens are made with advanced 8 in 1 (Hardened/SiO2/ZrO2/SiO2/ZrO2/ITO/SiO2/User) coating technology to effectively block UV400 and electromagnetic radiation, filter out high energy blue light and other harmful light, imitate natural condenser, reduce glare and improve contrast, and restore true colorsWe are improving our products based on customers' feedback. The color of the BB40 lenses is lighter than the previous yellow lenses, result in avoiding color distortion to a greater extent, with 40% blue light blocking for wavelength 395nm-500nmInformation for blue light:Blue light wave is one of the shortest, highest-energy wavelength that's between approximately 380nm and 500nm in visible light spectrum. Blue light is actually everywhere including the sun, digital screens (TVs, computers, laptops, smart phones and tablets), electronic devices, and fluorescent and LED lightingNatural blue light vs. artificial blue light:Natural blue light comes from the sun. Our body uses blue light from the sun to regulate our natural circadian rhythm (sleep and wake cycles), boost alertness, heighten reaction times, elevate moods, and increase the feeling of well beingArtificial sources of blue light include digital screens such as TVs, computers, smart phones, and fluorescent and LED lights. CARETo avoid damage, never contact with acid, and avoid using paper, towels, clothing, alcohol, household detergents or soaps to clean your reading glasses. While a few mild soaps don't harm lenses, today's extra strength soaps are powerful enough to slowly disintegrate lens coatings
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