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Cataract surgery

A close up of a surgeon’s hands, holding tools to perform eye surgery on a patient obscured from view.

Cataract surgery is an operation which replaces the cloudy lens in your eye with a clear artificial one. This can improve your vision. It’s normal to have questions or feel nervous about having cataract surgery. We have information about cataract surgery to help you feel more confident and prepared.

What checks happen before surgery?

You’ll have a pre-surgery appointment before your surgery.

Your clinical team will explain what to expect before, during, and after surgery, including the risks and benefits. If you decide to go ahead, you’ll sign a consent form once you feel fully informed.

Before surgery, you’ll have a pre-op assessment. This checks your general health, reviews medications, and measures your eyes to select the right artificial lens. If you’ve had previous eye surgery or wear contact lenses, let your team know. Any eye conditions such as dry eye or blepharitis may need treatment before surgery to reduce infection risk.

Cataract surgery is often done one eye at a time, starting with the one that has worse vision. Your second eye may be scheduled later, or if both need treatment and there are no complicating factors, you may be offered same-day surgery (known as immediate sequential bilateral cataract surgery).

Your clinical team will also let you know what you need to do to get ready for surgery, for example, taking time off work, managing your medications, arranging transport (you won’t be able to drive yourself), and planning support at home if needed.

You can ask your clinical team any questions about your surgery. We have a list of questions to ask here.

What happens during cataract surgery?

During cataract surgery, the cloudy lens in your eye is replaced with a clear artificial one. The artificial lens is a permanent solution. It’s usually made of plastic or silicone.

Most people have the operation under a local anaesthetic. This means that you’ll be awake during the operation, but you won’t feel any pain. The local anaesthetic will usually be given as eye drops, but occasionally an injection may be used or a combination of both.

If you think that having the operation with a local anaesthetic may be difficult, speak to your clinical team as soon as you can. It’s possible to have the cataract surgery under general anaesthetic in certain situations.

You should probably plan to be at the clinic for half of the day of your surgery. Your clinic will tell you when to arrive and when you can expect to leave. On the day of surgery, a member of the clinical team will tell you what will happen. You will normally be seen by the nursing team first, then by the ophthalmologist who will do the operation.

The main steps in cataract surgery are usually: · You’ll have eyedrops to widen the pupil in your eye.

  • You’ll be asked to lie down flat on a comfortable trolley bed and keep your head still.
  • You’ll have eyedrops or an injection around your eye, so you won’t feel any pain.
  • You’ll have the area around your eye cleaned to help prevent infection.
  • Your face will be covered with a clean sheet with a hole for your eye, to help protect you from infection.
  • The surgeon will make a tiny hole through the front of your eye and the clear layer in front of the lens (the lens capsule). The lens capsule keeps the lens in place.
  • Your eye will be numb, so you won’t feel any pain.
  • The surgeon will break up the old lens with a probe that uses ultrasonic vibrations.
  • The surgeon will remove the old lens with suction.
  • The surgeon will put an artificial lens inside the lens capsule. The lens capsule holds the new lens in place.
  • You won’t be able to see details of what’s happening during the operation. You might be able to see lights or shadows.
  • You may hear the clinical team talking during the operation. It’s important that you remain still. The clinical team will let you know how you can communicate with them during the surgery, if you need to.
  • The team will tell you when your surgery is finished.

Cataract surgery is one of the quickest operations you can have. Cataract surgery usually takes around 20 minutes. In some cases, it can be even quicker than this and some cases may take longer depending on your circumstances. Your clinical team will be able to let you know if your surgery might take a little longer.

At the end of the operation your eye may be covered with a dressing or more commonly with a clear eye shield to keep it clean. You will be checked shortly after the surgery. When your clinical team is happy with your eye, you’ll be able to go home. You won’t need to stay in hospital overnight.

Watch our what to expect during cataract surgery story

Frequently asked questions - post surgery

What happens if I have cataracts in both eyes?

Cataract surgery can be done one eye at a time, starting with the eye that has worse vision. Surgery for your second eye may also be considered and planned for at your pre-op appointment. If appropriate, it can be scheduled in for some time after the first procedure. However, if the vision in your second eye isn’t impacted too much at this time, your optometrist can refer you back to the cataract clinic when surgery becomes necessary.

If there are no complicating factors, then you may be offered cataract surgery on both eyes at the same time. Particularly if you require general anaesthesia, it is usually safer to remove both cataracts at the same time. This is known as immediate sequential bilateral cataract surgery (ISBCS).

If you are having cataract surgery on both eyes on the same day, the ophthalmologist will first operate on one eye. Once the first eye surgery is completed successfully, they will operate on the second eye. You’ll stay in the operating theatre throughout, but the two procedures are completely independent. Separate surgical equipment will be used for each operation. This reduces the risks of having surgery to both eyes at the same time.

What happens after cataract surgery?

Cataract surgery is usually safe and successful. You can usually go home the same day. We have information about what happens after surgery, including what your sight may be like and how to look after your healing eye.