When should I have cataract surgery?

One of the most common questions I am asked is whether it is the right time to have cataract surgery. The answer is usually based on how much the cataract is affecting your daily life, not on a specific number on the eye chart. Cataracts develop slowly, and there is a wide window of time in which surgery is appropriate. The key is to understand when waiting no longer makes sense and when the benefits of surgery outweigh the small risks.

Cataracts do not need to be 'ripe' anymore

In the past, patients were often told to wait until a cataract was 'ripe' or mature. Modern cataract surgery is safest and most effective when the cataract is still relatively soft. Waiting until the lens is very dense can make the operation technically more difficult, increase the energy needed inside the eye, and slightly raise the risk of complications. It can also prolong recovery. Today, the decision is based on your symptoms and needs, not on how dense the cataract looks.

Signs it may be time to consider surgery

The right time for cataract surgery is when your vision problems start affecting your quality of life. Common signs include:

- Difficulty driving at night because of glare from headlights

- Trouble reading or doing close work, even with good glasses

- Colours looking dull or washed out

- Double vision or ghosting in one eye

- Difficulty recognising faces or seeing television clearly

- Failing to meet the legal driving vision standard

- Struggling with work, hobbies or social activities because of poor sight

If any of these sound familiar, it is worth having a cataract assessment.

Driving is often the deciding factor

For many people, the first practical problem caused by a cataract is night driving. Glare from headlights, reduced contrast and slower glare recovery can make driving feel unsafe or stressful. If you are no longer comfortable driving at night, or if you have been told your vision does not meet the driving standard, cataract surgery may be the right next step.

You should not continue to drive if your vision does not meet the legal requirements. Your optometrist, GP or ophthalmologist can advise you, and the Driver and Vehicle Licensing Agency (DVLA) has clear vision standards for driving.

Can cataracts be monitored instead of operated on?

Yes, in the early stages. If your cataract is mild and your vision is still good, the usual approach is watchful waiting. Regular eye tests will monitor whether the cataract is progressing and whether it is affecting the back of the eye. We may update your glasses prescription to help you see better for as long as possible.

However, monitoring is only sensible while the cataract is not causing significant problems. If your vision is declining, surgery should be discussed sooner rather than later.

Are there risks to delaying surgery?

For most people, delaying surgery for months or even a few years is low risk. The main downside is gradually worse vision and a slightly more complex operation if the cataract becomes very dense. In rare cases, a very advanced cataract can cause other problems such as angle-closure glaucoma or inflammation, but these are uncommon.

The real risk of delaying is not medical, but practical. Poor vision increases the risk of falls, reduces independence, affects mood and social life, and can stop people from doing the things they enjoy.

When waiting is not a good idea

There are situations where it is better not to wait. If the cataract is making it hard to monitor or treat another eye condition, such as diabetic retinopathy, glaucoma or age-related macular degeneration, surgery may be needed to give a clear view of the back of the eye. If the cataract is causing a significant difference in prescription between the two eyes, or if you are struggling with balance and falls, earlier surgery is often recommended.

What to expect at the assessment

A cataract assessment measures your vision, examines the cataract, and checks the health of the front and back of the eye. We also discuss your lifestyle, what you want to achieve, and the lens options that may suit you. This is the right time to ask questions about timing, recovery, lens choice and any concerns you have.

Next steps

If you are wondering whether it is time for cataract surgery, start with a comprehensive cataract assessment. There is no pressure to proceed, and you will leave with a clear understanding of your options. For most people, the right time for surgery is when the cataract is affecting life more than they want to put up with — and modern surgery can usually restore clarity quickly and safely.