In traditional cataract surgery, the natural lens is removed and an artificial, monofocal lens is implanted. A mono-focal lens is designed to help you see clearly at a singular focal point, whether it be near, intermediate, or distant.
An extended depth of focus lens is a lifestyle or presbyopia-correcting lens. Its goal is to reduce your dependence on glasses and/or contacts following cataract surgery by giving you clear intermediate and distance vision.