ThinOptics are the thinnest, lightest and most durable reading glasses in the world. Attach the ThinOptics Universal Pod Case to the back of your phone, and your reading glasses will always be with you everywhere you go. Never forget your glasses again! The lenses are prescription ready and made of optical-grade polycarbonate, making it very light, thin, and shatter-proof. Lenses are prescription ready Universal Pod case features non-residue adhesive to stick onto your phone/case or any other hard and flat surface Optical-grade polycarbonate lenses Ultra-flexible, titanium alloy bridge Flex-fit technology delivers a universally comfortable yet stable grip on any nose, up high or down low.