HiroVision Glasses Adjustable Lens Eyeglasses Reading Distance - Brand new/sealed ( does not correct for astigmatism ) It works through a new creation called Dual Lens Technology. This lens system features two thin, wave-shaped “plates” that slide across each other when you turn the adjuster dial on the side of the frame. The position of the two “plates” determines the power of the lens system. HiroVision glasses are designed to replace all your spare and reading glasses. The power of the lenses can be customized instantly to correct from -6 diopters of nearsightedness to +3 of farsightedness with the simple turn of a dial. HIROVISION FEATURES HiroVision is the first and only brand that offers Dual Lens Technology. Our unique and patented technology is here to satisfy all wearers of spectacles. Adjustable Lens Technology Adjust your vision instantly for any situation. Perfect for reading, driving, watching TV, sports, etc. Impact Resistant Lenses HiroVision glasses are sturdy and can easily handle a drop. High Wearing Comfort The flexible frame offers maximum comfort and adjusts to your head for a snug fit. Adjustable Nose Pads The fully adjustable nose pads offer high wearing comfort. Scratch Resistant Coating HiroVision lenses are treated with a special anti-fog scratch-resistant coating. Easy to Clean Cleaning the lenses is super easy. Simply run them under warm water with a drop of soap.