Eyekepper Anti Blue Light Glasses for Boys Kids Computer Eyeglasses Rectangle Memory Frame plastic frame anti-reflective lens non-polarized Lens width: 46 millimeters In order to block much more blue, we upgraded the coating to more than 12 layers and visable on both side of the lens, the coating may have a little result in some reflect lights back into eyes from the inner side. PRODUCTS DIMENSION - Frame material is Memory Titanium, Lens width about 1 13/16 inches (46mm), Frame width about 4 15/16 inches (125mm), Lens height about 1 1/16 inches (27mm), Frame height about 1 1/8 inches (29mm), Bridge (DBL) about 9/16 inch (15mm), Temple length about 4 15/16 inches (125mm), with spring hinge, fit 3-8 years children. UV PROTECTION - Will keep eyes safe from harmful UV light, designed for anyone using an electronic device such as computers, T.V.'s or phones. This meets the requirements of the U.S. FDA, and exceeds European Union requirements ANTI BLUE EYEGLASSES - Anti Blue Glare and Scratch Resistant Lens, Dark Orange tinted lenses, UV Protection. Superior Blue Light Blocking Computer Glasses that will reduce eye strain when working on a computer, tablet, phone or television. Excellent for Relieving Visual Discomfort and fatigue associated with using a computer for long periods of time EYEKEPPER COMPUTER GAMING GLASSES - Superior Blue Light Blocking Computer Glasses that will reduce eye strain when working on a computer, tablet, phone or television. FDA Registered Gamer Glasses and Computer Eyewear, Accord with ANSI Z80.3-2010, Accord with BS EN ISO 12312-1:2013 and EN14139:2010,Accord with AS/NZS 1067:2009, spring-loaded hinges You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it! Per the Occupational Safety &amp; 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 100% high energy visible light from tablets, phones, TV, computers and more. Our lenses code is <span class="a-text-bold">BB98</span> for the Eyekepper blue block glasses. Spectrum analyzer-Use to test different wavelength from 280nm to 780nm,e.g 400nm,430nm,460nm and 550nm Use to test wavelength is 430nm - 460nm The data of left is visiable light The data of middle is blue light remaining The data of right is UV light remaining Only use to test the data less than 400nm for UV light ,can not use to test the blue light for wavelength more than 400nm Left photo is show without Eyekepper anti radiation lenses,you will find the warning light and alarm Right photo is show with Eyekepper anti radiation lenses,you will not find the warning light and alarm Strength Pupil distance Horizontal position Astigmatism Prism Color is transmitted through transparent media. All colors added together = white. The absence of light = true black. Because computer graphics, websites, and other digital presentations are projected/transmitted with light, screen-targeted graphics should be saved in this color model, or RGB Mode. paper towels clothing alcohol household detergents soaps