Crystalens accommodating lens
The first procedure is phacoemulsification (phaco) and the second involves two different types of extracapsular cataract extraction (ECCE). Foldable lenses are generally used for the 2-3mm phaco incision, while non-foldable lenses are placed through the larger extracapsular incision.The small incision size used in phacoemulsification (2-3mm) often allows "sutureless" incision closure.During cataract surgery, a patient's cloudy natural cataract lens is removed and replaced with a synthetic lens to restore the lens's transparency.
The multifocal intraocular lens is one of the newest types of such lenses.In this technique, the cataract is extracted through use of a cryoextractor — a cryoprobe whose refrigerated tip adheres to and freezes tissue of the lens, permitting its removal.Although it is now used primarily for the removal of subluxated lenses, it was the favored form of cataract extraction from the late 1960s to the early 1980s. The Crystalens is on struts and is implanted in the eye's lens capsule, and its design allows the lens' focusing muscles to move it back and forth, giving the patient natural focusing ability.Cataract surgery is generally performed by an ophthalmologist in an ambulatory setting rather than an inpatient setting, in a surgical center or hospital.Either topical, peribulbar, or retrobulbar local anesthesia is used, usually causing little or no discomfort to the patient.
They are often referred to as "premium" lenses because they are multifocal and accommodative and allow the patient to visualize objects at more than one distance, removing the need to wear eyeglasses or contact lenses.