ADJUSTABLE GLASSESEach lens has a diopter range of -6.0 to +3.0 giving you fine control over the magnification. With this you don't have to buy multiple prescription lenses! These glasses are perfect for most vision needs. HIGH STRENGTH AND LIGHTWEIGHT MATERIALWe use high quality PC material to produce our glasses our glasses only weigh 27.2 grams you can wear them for hours and forget about them. DURABLEThe adjustable focal length glasses are anti-wear anti-drop lens light resin HD optimized thickness design light weight ultra-thin sturdy scratch-resistant waterproof and oil-proof providing you with more reliable safety protection. SUITABLE FOR MANY OCCASIONSReading glasses are suitable for indoor and outdoor wear around the clock suitable for people with presbyopia problems especially when reading books newspapers watching TV playing games traveling parties fishing this is a thoughtful and practical Practical helper for glasses. GLASSES CASEOur eyeglasses work for both nearsighted and farsighted users but not for people with astigmatism. They correct over 90% of spherical errors. Get the best value for your money!