This is the optical quality, single vision MV Optical round Model 36 with CR39 optical reading lenses. This is a cute rectangular acetate frame with widened temples decorated with a cute floral patter. Made from hand finished smooth acetate, this is slightly boxy look that makes one look smart and fits on a wide variety of head shapes. Integrated spring hinged temples make for a very comfortable fit. The temples have integrated spring hinges assuring a comfortable fit. Model 36, by the experts at Multi-View Optical is a very high end, optical quality acetate frame sized for an average female head size. These single vision CR39 acrylic lens reading glasses are available in any power from +1.0 up to a +2.0. A CR39 optical lens is the latest in reading lens technology: Impact Resistant, Thin Light Weight, scratch resistant and includes 100% UV protection. Style 36 has a smooth finish on a optical quality acetate frame with spring hinged temples. Available in Black, Brown or Wine, includes a clam shell design hard protective case.. Style 36 is sized for an average head size. Here's the optical sizing scoop on Style 36: Lens: 48mm, Bridge: 19mm, Temple: 140mm