The Zippo 31z-B1 reading glasses with 1 diopter in black are the ideal choice for clear vision while reading. Made by the renowned brand Zippo, known for quality and durability, these reading glasses provide precise correction for near vision. The simple black design makes them a timeless accessory for everyday use. The lenses are set to 1 diopter, optimal for mild vision impairments. A reliable companion for books, magazines, and digital devices.