A cataract is a 'clouding' on the lens of the eye which occurs due to changes in the proteins which make up the lens of the eye. Cataract disease restricts the light flow to the retina and limits the vision of the patient. Most cases are age-related, but some of them are caused by other diseases of the eye.
The only solution for cataracts is surgery. This involves removing the cloudy lens to restore the clarity of the optical axis and replace it with and an intraocular implant. The converging lens, located within the eye, is fragmented and then removed through a special ultrasound device. An intraocular artificial lens is then inserted into the eye. Cataract operations are usually performed without requiring hospitalization, and recovery is rapid: patients can return to their normal lives after just a few days.