What Happens If Cataracts Are Left Untreated?

No. A cataract diagnosis does not automatically mean you need surgery straight away.

If your cataracts are mild and your vision still allows you to comfortably carry out your usual activities, monitoring may be entirely appropriate.

An updated glasses prescription may improve your vision for a period, while brighter lighting can make activities such as reading more comfortable.

The decision becomes more relevant when the cataract begins to interfere with the way you live.

This might mean struggling to drive confidently at night, needing much brighter light to read, experiencing troublesome glare or finding hobbies and everyday tasks increasingly difficult.

There is also no need to wait until a cataract is considered “ripe”. Modern cataract treatment is based much more on the effect the condition is having on the individual patient than on reaching a particular stage of cloudiness.

For a more detailed explanation of how this decision is made, read When Is Cataract Surgery Necessary? How Consultants Decide It’s Time.

There is no single timetable.

One person may be diagnosed with mild cataracts and experience relatively little change for several years.

Another patient may notice their vision deteriorating much more quickly.

The two eyes can also progress at different rates.

This is why simply asking how long you have had cataracts does not tell the whole story.

A more useful question is:

Has your vision changed enough to affect the way you live?

Regular eye examinations allow changes in your eyesight and eye health to be monitored.

It is also worth remembering that cataracts normally cause gradual visual change. A sudden significant loss of vision, severe eye pain, new flashes or floaters, or a shadow across your vision should not simply be assumed to be caused by a cataract and requires prompt assessment.

Cataract symptoms are not identical for everyone, but several changes are particularly common.

Increasingly blurred or misty vision

The world may gradually appear less crisp.

Patients sometimes describe their eyesight as though they are looking through a slightly cloudy window.

The change can be subtle initially and may become more noticeable over time.

Reduced contrast

One of the less obvious effects of cataracts is reduced contrast.

You may still be able to read bold letters on an illuminated eye chart yet find it harder to distinguish detail in everyday environments.

Reading in lower light levels can become more difficult and you may increasingly need to use additional light sources.

Increasing glare

Bright light can become uncomfortable or distracting.

This may be particularly noticeable with:

• Car headlights
• Bright sunshine
• Low level sunlight
• Artificial lights at night

For some people, glare becomes one of the main reasons they begin considering cataract surgery.

Difficulty seeing at night

Cataracts can make vision in dimmer conditions more challenging.

Night and twilight driving may gradually feel less comfortable, while oncoming headlights can create additional glare.

Colours may appear less vivid

Colours can begin to appear duller or faded as cataracts progress.

Because this tends to happen gradually, some people do not appreciate how much their perception of colour has changed until after their cataracts have been treated.

Your glasses prescription may change more frequently

Cataracts can alter the prescription of the eye.

An updated glasses prescription may therefore improve vision for a period of time.

However, glasses cannot remove the cloudiness within the natural lens, so their ability to compensate can become more limited as the cataract progresses.

Yes.

Driving is often one of the first situations in which patients become particularly aware of cataract symptoms.

You may begin to notice that road signs are less clear than usual, or you cannot read them until you are closer. Also, driving at twilight feels more difficult.

Headlights from oncoming vehicles can produce troublesome glare, while low sunlight may also become more uncomfortable.

Some patients gradually stop driving at night before fully recognising how much their vision has changed.

Having cataracts does not automatically mean that you cannot drive. However, your eyesight must continue to meet the required legal driving standard.

If you are unsure whether your eyesight remains sufficient for driving, speak to your optometrist or ophthalmologist.

One of the challenges with cataracts is that vision often deteriorates gradually.

People can therefore adapt their behaviour without immediately noticing how much their lifestyle has changed.

Perhaps you have started avoiding driving at night.

You may be reading less because it feels tiring, or finding that you need brighter lighting around the house.

Maybe you are asking someone else to drive you to unfamiliar places or have stopped doing a hobby that requires detailed vision.

These adaptations can seem small individually.

Over time, however, they may represent a meaningful loss of independence.

This is why cataract treatment decisions are not based solely on an eyesight measurement.

The impact on daily life matters too.

If your cataracts remain mild, you may be able to continue monitoring them for some time.

However, the cataract itself will remain and is likely to become progressively more advanced.

As this happens, you may experience increasing difficulty with the activities that rely on good quality vision.

These might include reading, driving, computer work, watching television, sport or caring for other people.

Eventually, untreated cataracts can cause severe sight loss.

This does not mean every cataract progresses quickly or that you should feel pressured into treatment.

The aim is to monitor your vision and make an informed decision when the impact of the cataract becomes significant enough for you.

Yes. If cataracts become sufficiently advanced, they can cause severe sight loss.

This happens because the natural lens becomes so cloudy that light can no longer pass through it effectively.

However, it is important to put this into context.

Cataracts usually progress gradually, and patients have the opportunity to monitor their eyesight and consider treatment before vision reaches this stage.

Cataract surgery removes the cloudy natural lens and replaces it with a clear artificial intraocular lens (IOL), also described as an artificial implant lens.

The visual improvement you can expect from surgery also depends on the health of the rest of the eye.

Conditions affecting the retina, macula or optic nerve can influence the final quality of vision, which is one reason a detailed eye assessment is important before treatment.

For most patients, simply having an untreated cataract does not directly damage the eye.

The main consequence is that vision becomes progressively worse as the natural lens becomes more opaque.

However, there are unusual circumstances in which a very advanced cataract can contribute to additional problems.

For example, a very advanced and enlarged lens can occasionally contribute to increased pressure within the eye.

Your ophthalmologist can advise if there is anything about your individual cataract or eye health that makes continued monitoring less appropriate.

Very advanced or dense cataracts can sometimes make cataract surgery more technically challenging.

This does not mean that every patient should have early surgery.

Many people with mild cataracts can safely continue monitoring their vision until treatment provides a meaningful benefit.

Equally, there is no advantage in deliberately waiting until eyesight has become severely restricted before seeking advice.

The most appropriate timing is therefore a balance between several factors:

• How much your vision is affecting everyday life
• Your overall eye health
• Your lifestyle and visual requirements
• The likely benefit from treatment
• Your own feelings about surgery

For a deeper explanation, read When Is Cataract Surgery Necessary? How Consultants Decide It’s Time.

No.

The idea that patients should wait for cataracts to become “ripe” comes from historical surgical techniques for cataract treatment.

Modern cataract surgery does not require the cataract to reach an arbitrary stage before treatment can be considered.

The decision should instead focus on how much your cataract is affecting your eyesight and daily life.

One patient may be perfectly comfortable monitoring a cataract for several years.

Another may have similar measured eyesight but experience significant problems with glare, night driving or the visual demands of their occupation.

The appropriate time for surgery is therefore individual.

Sometimes.

An updated glasses prescription may improve your eyesight for a period, particularly if the developing cataract has changed the prescription of your eye.

Better lighting may also make reading and other close tasks easier.

However, glasses cannot remove the cloudiness within the eye’s natural lens.

As the cataract becomes more advanced, changing your glasses prescription may provide progressively less improvement.

If you find yourself repeatedly changing your prescription without achieving the quality of vision you want, it may be worth discussing whether cataracts are now becoming the main cause of your symptoms.

For many people with mild symptoms, monitoring cataracts is entirely appropriate.

Surgery is not required simply because a cataract has been identified.

You may be comfortable continuing to monitor your eyesight if you can still drive safely, read comfortably, work effectively and enjoy your usual activities.

The decision may start to change when you notice that cataracts are beginning to influence the way you live.

For example, it may be worth seeking further advice if glare is becoming troublesome, night driving is becoming difficult, reading requires increasingly bright light or you are starting to avoid activities because of your eyesight.

There is no universal deadline.

The decision should be personalised to your eyes and your circumstances.

It can help to think less about the cataract itself and more about what your eyesight is allowing you to do.

Ask yourself:

• Am I avoiding driving at night or twilight?
• Do I need much brighter lighting to read comfortably?
• Are computer screens or detailed tasks becoming harder
• Have I stopped doing hobbies because of my eyesight?
• Am I relying more on other people because of my vision?
• Do glare or bright lights interfere with everyday activities?
• Do I feel less confident in unfamiliar environments?

If the answer to several of these questions is yes, it may be worth arranging an assessment.

The decision does not need to be made purely on the basis of an eye chart.

It should take into account how you actually use your vision.

A cataract assessment is designed to establish much more than simply whether a cataract is present.

Your eye care team will assess your eyesight and eye health and consider whether the cataract is responsible for the symptoms you are experiencing.

Other eye conditions can sometimes contribute to reduced vision, so understanding the health of the retina, optic nerve and other structures within the eye is also important.

If cataract surgery is appropriate, treatment planning will include discussion about the artificial implant lens that will replace your cloudy natural lens.

Your lifestyle matters here too.

Driving, reading, computer use, sport, hobbies and your preference regarding glasses can all influence the discussion about the most appropriate lens.

You can explore the options in more detail in Choosing the Right Lens for Cataract Surgery: Why Your Lens Choice Matters.

It is also worth preparing questions before your appointment. Sapphire’s guide to Questions to Ask Before Cataract Surgery covers surgeon experience, artificial implant lens choice, recovery, risks and aftercare.

If you decide that it may be time to explore cataract surgery, the next decision is who you would like to look after your eyes.

Relevant cataract experience matters, but so does communication, clinical judgement and continuity of care.

You should understand who is making the treatment recommendation, who will perform your operation and who will remain responsible for your care afterwards.

Sapphire’s guide to How to Choose the Right Cataract Surgeon: Why Your Choice Matters explains the questions worth considering when comparing cataract surgeons.

You can also meet Sapphire’s consultant ophthalmic surgeons.

There is no single answer that applies to everyone.

Waiting may be entirely appropriate if your symptoms remain mild and your cataracts are not meaningfully restricting your life.

Surgery becomes more relevant when the benefits of improving your eyesight begin to outweigh the inconvenience and small risks associated with an operation.

The decision may therefore come down to questions such as:

Can I still do everything I want to do comfortably and safely?

Am I changing the way I live because of my eyesight?

Would clearer vision make a meaningful difference to my quality of life?

A specialist assessment can help you understand the likely benefits of treatment now compared with continued monitoring.

The aim should never be to rush someone into cataract surgery.

It should be to give you enough information to make the decision that is most appropriate for your eyes and your life.

There is no single point at which every cataract needs to be removed.

If cataracts are having little effect on your everyday vision, monitoring may remain the most appropriate choice.

If they are increasingly interfering with driving, reading, work, hobbies or independence, it may be time to explore your treatment options.

At Sapphire Eye Care, cataract treatment is consultant led, with decisions based on your eye health, symptoms, lifestyle and individual visual priorities.

Learn more about Private Cataract Surgery at Sapphire Eye Care or arrange a Free Online Consultation to discuss your symptoms and the next steps with an experienced optometrist.