1. Single Vision
Single Vision lenses are the standard eyeglass prescription. These glasses are for one field of vision across the entire lens.
Bifocals lenses include two fields of vision separated by a line. Usually, the top is designated for distance vision or computer-distance vision, and the bottom for near-vision work such as reading.
Progressive lenses include three fields of vision, without lines. The top portion is used for distance-vision, the middle portion (corridor) for mid-range vision, and the bottom portion for the near-vision or reading.
Looking to get glasses as accessories but don't require a prescription? Select non-prescription, plano lenses.