A cataract is generally treated through surgery. The entire cataract procedure takes approximately 20 minutes. The surgeon creates a tiny incision on the edge of your cornea and then uses an ultrasound system to break up and remove the cataract. Next, the lens is replaced with an artificial lens implant known as an intraocular lens (IOL). Depending on the type of intraocular lens that is best for you, a standard monofocal or multifocal lens will be inserted in the eye. The monofocal and multifocal lenses have different objectives and you would need to consult with your eye surgeon to determine which one best fits your needs.