Cataract surgery involves removing the cloudy lens (cataract) and replacing it with an artificial lens made of biocompatible material that is inserted into the eye and remains unchanged for life. Cataract surgery today is a minimally invasive outpatient procedure that allows for rapid visual recovery. Recent years have seen a revolution in intraocular lenses. These new lenses, called premium lenses, correct astigmatism and presbyopia and are custom-made for each patient. Premium lenses are fitted in highly specialized private eye clinics.