Clear Lens Extraction (Refractive Lens Exchange) replaces the natural lens of the eye with an artificial lens implant. The focus power of the lens implant is calculated to correct your refractive error (spectacle error), with the aim of producing good distance vision without glasses.
The procedure is commonly performed for people with higher refractive errors or who are unsuitable for laser eye surgery. This is often the case after the age of 50, when most eyes have already lost the natural ability to change focus for near (presbyopia). If there is early sign of cataract, laser surgery may not achieve a lasting effect because the focus of the eye is likely to change further as the cataract progresses.