Foster Grant Multi-Focus Conan Brown Tortoise reading glasses are sophisticated and sleek. This semi-transparent acetate style comes in rich tortoise with thick temples and simple silver accents. Multi-Focus Reading glasses utilize three different strength prescriptions in one pair of reading glasses. The bottom of the lens features the selected power for reading. The middle of the lens features a prescription slightly less than normal reading strength designed for computer use. The top of the lens features half the strength of the reading power for interacting with others.