When you combine the World's Thinnest Readers with our Universal Pod Cases, you have versatile Vision Solutions that go anywhere. Thin, lightweight, and durable Readers made from optical grade polycarbonate plastic. Available in a variety of magnification strengths (+1.0, +1.5, +2.0, and +2.5 diopters) and frame colors (Black or Clear). Attaches (via an included non-residue adhesive strip) to nearly any hard and flat surface, including the back of your smart phone or laptop. Just as easily, slip these reading glasses + case into your wallet, purse or pocket, to ensure that clear vision is Always With You!