Monofocal IOLs provide a single zone of clear focus and are usually implanted to provide excellent distance vision. Patients with monofocal IOLs will typically require the use of reading glasses for near vision tasks, such as reading or sewing.
Multifocal, extended depth of focus and accommodating IOLs (Advanced IOLs) are designed to provide a fuller range of vision with minimal, if any, need for glasses or contact lenses.