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Home.
How the Eye Works.
What is a Cataract.
How to Treat.
Cataract Surgery.
Capsular thickening.
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Risks

In the past surgeons waited for a cataract to mature before it was removed and many patients still expect this to be the case. However, these days it may be considered better to remove it at an earlier stage rather than wait.

We all have some degree of cataract, and as we get older they start to cause problems. As with everything, there are no hard and fast rules about operating and the decision should be made between the patient and the surgeon. I will ask how a patient is affected by the condition and must then measure this against any possible risk involved in surgery. Most patients feel that if they are able to read, watch television and recognise people across the road, they may have more to lose than to gain from an operation and prefer to defer a decision until a later date. Sometimes quite small changes, such as wearing a wide brimmed hat and dark glasses to overcome the glare and dazzle associated with early cataract, can be enough to delay any decision. Conversely, if the patient is a driver, he/she must conform to legal requirements if they wish to continue to drive. These stipulate that a driver must be able to read a number-plate in good daylight (with glasses, if worn), at a distance of 20.5 metres (67 ft.), equating to a visual acuity of between 6/9 and 6/12 (20/30 and 20/40). Patients whose sight falls below this level but want to continue to drive will need to
undergo surgery.

Every operation carries some degree of risk and in the case of cataract surgery this is 2-3%. Clearly, this is a low risk to weigh against visual reward if sight in the' fellow' eye (the eye not undergoing surgery) has good sight, but it presents a very different choice if the fellow eye has little or no sight, creating a situation known as One or Only Eye Surgery. I ask my patient to cover up the eye that is considered for surgery and make it clear that what they see now is the sight they would be left with should something untoward happen during surgery.