What does cataract surgery do?
The purpose of cataract surgery is to restore loss of vision caused by clouding of the human lens. Cataract surgery involves the removal of the cloudy natural lens and its replacement with an artificial lens (known as an Intra-Ocular Lens, or IOL). Doing this will allow light to be focussed clearly on the retina again, improving your vision. It will not correct any other conditions you may have such as glaucoma, eye disease from diabetes or macular degeneration.
Introduction (IOL & Cataract)
The IOL stays in your eye permanently; it will not wear out. Only very rarely are there problems with the lens so that it would need to be changed.
Most people will still need to wear glasses (or contact lenses) for distance, or for near, or for both, for the best possible vision afterwards.
Phacoemulsification is the most common technique currently in use for removing cataract; the technique involves breaking up the cataract inside the eye, using ultrasound energy, before it is removed. Bimanual Micro-Incision Cataract Surgery (BMICS) is an advance on standard phacoemulsification utilising much smaller incisions, which offers some benefits to patients.