What is it?
A cataract is a clouding of the natural lens of the eye. Cataract surgery removes the clouded lens, usually with ultrasound (phacoemulsification), and replaces it with a clear artificial intraocular lens.
Why it may be recommended
Surgery may be recommended when a cataract interferes with daily activities, or when it prevents adequate examination or treatment of the retina. In some patients cataract surgery is combined with vitrectomy.
How it is performed
The operation is usually done under local anaesthesia through a small incision. The clouded lens is broken up and removed, and an intraocular lens is placed in its position.
Preparation
Measurements of the eye are taken before surgery to choose the lens power. Your medicines and general health are reviewed, and you receive instructions about eye drops.
Recovery
Vision often improves within days, although full stabilisation can take several weeks. Eye drops are used for a period after surgery, and new glasses may be needed.
Possible risks
Possible risks include infection, inflammation, raised eye pressure, swelling of the macula, clouding of the capsule behind the lens (which can be treated with laser) and, rarely, retinal detachment.
Follow-up
Follow-up visits check healing and vision. Glasses are usually prescribed once the eye has stabilised.
Information on this website is educational and does not replace an in-person medical examination, diagnosis or individual medical advice.