Cataract is a clouding of the natural lens inside the eye, causing blurred vision. When the cataract has advanced sufficiently to impair daily routine and even glasses do not help much, surgery is the only option. Medicines cannot reverse cataract changes in the eye. In cataract surgery, the lens inside your eye that has become cloudy is removed and replaced with an artificial lens (called an Intra-Ocular Lens or IOL) to restore clear vision. Cataract is removed manually through an incision of 5.5mm. A PMMA lens is implanted in this surgery.