Intraocular lenses (IOL) are implantable lenses that are inserted into the eye during cataract surgery. These lenses are made of plastic or silicone materials and placed permanently in the eye after removal of the eye’s natural lens. Intraocular lenses may be either monofocal or multifocal. Monofocal lenses have a single zone of clear focus, usually set for excellent distance vision, but require the use of reading glasses for near tasks, like reading or sewing. Multifocal lenses have several zones of clear vision and allow for both distance and near vision correction.
