No prescription is needed for these Ryman reading glasses. These inexpensive yet high quality reading glasses have a lens power of + 2.0 so that you can enjoy reading, using phones, tablets and computers without straining your eyes. These stylish and modern glasses have striking black plastic frames with contrasting green arms as well as optically centred lenses. . Ryman Reading Glasses + 2.0. Full Strength 2.0. Sprung Frame . Optically Centred Lenses . Conforms to BS EN 14139 2010 . Do not wear when driving