Clip On-Reading Glasses with blue light filter . About Product: Clip-On & Flip-Up! is known as Clip-On reading glasses, magnifier, magnify glasses however they are made of polycarbonate that is resistant and lightweight(approx 17 grams). The strength or power of the lens is tested before being marked, This new version has a filter for the harmful blue light of the screens. you can use them when you want for a near-natural vision and simply flip-up when you do not need them, work very well on any glasses whether they are formulated, sunglasses, no magnification or simply just a protective frame. PRODUCT SIZE: Perfect size to cover almost all the lenses of the frames, if this device is too small you would not have the proper field of view, please understand that the size of the lens of this clip should be so for your visual comfort and also if your frame It is very curved, possibly no clip-on will adapt properly.: Lens Width approx 55mm, Lens Height approx 41 mm. NEW PRODUCTION WHIT PLASTIC CASE. If you have any problem with our products, please contact our email American Vision & Vision LLC on the Amazon system or let us know at: Have a question ?. Customers can return and get refunded in case the purchasing is not satisfactory for any reason, Just contact us and let us know we guarantee your satisfaction. Advertising of non-prescription ready-to-wear magnifying spectacles or glasses: "ATTENTION; READY-TO-WEAR NON-PRESCRIPTION GLASSES ARE NOT INTENDED TO REPLACE PRESCRIBED CORRECTIVE LENSES OR EXAMINATIONS BY AN EYE CARE PROFESSIONAL, THIS DEVICE DOES NOT ATTEMPT TO DIAGNOSE, TREAT OR PREVENT ANY VISUAL DISEASE, IT`S ONLY A SUPPORTIVE MAGNIFY, CONTINUOUS EYE CHECK-UPS ARE NECESSARY TO DETERMINE YOUR EYE HEALTH STATUS AND VISION NEEDS."