The most common symptoms before cataract surgery include blurry or cloudy vision, increased glare from bright lights, difficulty seeing at night, faded colours and needing brighter light to read. You may also notice that your glasses prescription changes more often or that everyday activities become harder. These symptoms can develop gradually as the natural lens inside your eye becomes cloudy.
Cataracts do not always cause noticeable symptoms in their early stages. As they progress, however, they can affect how clearly you see, how comfortable you feel driving at night and how easily you manage daily tasks.
If you have noticed changes in your vision, an eye examination can help establish whether cataracts are the cause. Your specialist can assess how much your vision is affected and explain whether cataract surgery may be suitable for you.
What is a cataract?
A cataract is the clouding of the natural lens inside your eye. This lens helps focus light onto the retina at the back of your eye, allowing you to see clearly.
As you get older, changes in the lens can cause it to become cloudy. Light then passes through the lens less effectively, which can lead to blurred vision, glare and other visual changes.
Cataracts commonly develop with age and can affect one or both eyes. They may progress at different rates, so you might notice that one eye sees more clearly than the other.
Not everyone with a cataract needs surgery straight away. If your vision is still good enough for your everyday activities, your specialist may recommend monitoring the cataract. Surgery may be considered when your vision problems begin to affect your quality of life.
Learn more about cataracts, their causes and treatment options.
What are the most common symptoms before cataract surgery?
The symptoms of cataracts vary from person to person. Some people mainly notice blurred vision, while others find that glare, poor night vision or changes in colour perception are more troublesome.
Recognising these symptoms can help you decide when to arrange an eye examination.
1. Blurry or cloudy vision
Blurred or cloudy vision is one of the most common symptoms of cataracts. Objects may look less sharp, and you may feel as though you are looking through a misty or dirty window.
You might notice that reading, recognising faces, watching television or seeing road signs becomes more difficult. Your vision may also remain blurry even after you have updated your glasses prescription.
Although cataracts can cause these changes, other eye conditions can also affect your vision. An eye examination is needed to identify the cause.
2. Increased glare and sensitivity to bright lights
Cataracts can scatter light as it passes through the cloudy lens. This may make bright lights uncomfortable or cause glare that interferes with your vision.
You might notice glare from the sun, indoor lighting or oncoming headlights. You may also find that bright lights create halos or appear to spread across your field of vision.
These symptoms can be particularly noticeable when driving at night or moving between areas with different lighting.
If glare is making everyday activities difficult, an eye specialist can check whether cataracts or another condition may be responsible.
3. Difficulty seeing at night
Cataracts can make it harder to see in dim lighting. You may struggle to recognise objects in darker rooms, read in the evening or see clearly when driving after dark.
Headlights and streetlights may also appear brighter than before, making night driving more tiring or uncomfortable.
If your night vision has deteriorated, do not assume that you simply need stronger glasses. Arrange an eye examination to establish what is causing the change. If you cannot see clearly enough to drive safely, avoid driving until you have received appropriate advice.
4. Colours that look dull or yellow
A cataract can change how you perceive colours. White objects may appear yellowish, while other colours may look faded or less distinct.
Because these changes often happen slowly, you may not immediately realise that your colour perception has changed.
Some people notice a difference after cataract surgery because the cloudy natural lens has been replaced with a clear artificial lens. However, the improvement in colour perception varies depending on the health of the eye and other factors.
5. Needing brighter light to read
If you increasingly need a brighter lamp to read a book, use your phone or complete close-up hobbies, cataracts could be one possible explanation.
Small print may become harder to distinguish, even when you wear reading glasses. You may also find yourself moving closer to a light source to see more comfortably.
Although brighter lighting may help temporarily, persistent changes in your near vision are worth discussing with an optometrist or eye specialist.
6. Frequent changes to your glasses prescription
You may notice that your glasses no longer seem to correct your vision as well as they used to. Your prescription might change more frequently, or a new pair of glasses may improve your sight without fully resolving the blur.
Cataracts can sometimes cause changes in the way the eye focuses light. However, frequent prescription changes can have other causes, too.
If your vision continues to change despite updated glasses, arrange an eye examination to check for cataracts and other possible explanations.
7. Double vision or ghost images in one eye
Some cataracts can cause double vision in one eye, sometimes described as ghosting. You might see a faint second image alongside an object, making text or fine details harder to distinguish.
Double vision can also result from other eye conditions or problems with how the eyes work together. It should not automatically be attributed to cataracts.
If double vision starts suddenly, seek urgent medical advice, particularly if it occurs alongside severe headache, weakness or other new neurological symptoms.
Do cataracts cause eye pain?
Cataracts are usually painless. Most people notice gradual changes in their sight rather than discomfort in the eye itself.
You should not assume that eye pain is caused by a cataract. Pain, significant redness or sudden changes in vision may indicate another eye problem that needs prompt assessment.
Seek urgent medical advice if you experience sudden vision loss, severe eye pain, a painful red eye or a sudden onset of flashes and floaters or a dark shadow across your vision. These symptoms can have causes other than cataracts and should not wait for a routine appointment.
When should you see an eye specialist about cataract symptoms?
Arrange an eye examination if you notice persistent changes in your vision, particularly if they are beginning to interfere with daily activities.
You may find it harder to read, recognise faces, use a computer, drive at night or carry out tasks at work. You might also feel less confident moving around in unfamiliar places because your vision is not as clear as it used to be.
An eye examination can help determine whether you have cataracts and whether another condition may be contributing to your symptoms.
If a cataract is present, your specialist can assess its effect on your vision and discuss your options. You do not necessarily need surgery as soon as a cataract is diagnosed. The decision depends on your visual needs, eye health, symptoms and preferences.
When is cataract surgery needed?
Cataract surgery is generally considered when the cataract affects your vision enough to interfere with your quality of life or everyday activities.
There is no single level of visual impairment at which everyone needs surgery. For one person, difficulty reading may be the main concern. For another, glare while driving or problems with work and hobbies may have the greatest impact.
During an assessment, your specialist will examine your eyes, measure your vision and consider your symptoms and lifestyle. They will also check for other eye conditions that could affect your vision or the expected outcome of surgery.
If surgery is appropriate, the cloudy natural lens is removed and replaced with a clear artificial lens, known as an intraocular lens implant.
You can learn more about cataract surgery and how the procedure works.
Can cataract surgery improve these symptoms?
Cataract surgery removes the cloudy natural lens that is affecting your vision. For many people, this improves visual clarity and makes everyday activities easier.
Depending on the individual, improvements may include:
- Clearer vision when reading, watching television or recognising faces.
- Less difficulty with glare and bright lights.
- Better vision in low-light conditions.
- Colours that appear brighter or more distinct.
However, the results vary. Other eye conditions, such as macular degeneration, glaucoma or problems affecting the retina, may limit how much vision improves after surgery. Glare and night-driving difficulties may also persist to some extent.
The type of artificial lens used can influence your vision after surgery. Your specialist can explain the available options, including premium lens choices, and discuss which may suit your eyes and visual priorities.
Cataract surgery is not a guarantee that you will never need glasses again. Your likely outcome depends on several factors, including your eye health, the lens selected and your individual visual needs.
What happens during a cataract assessment?
A cataract assessment helps establish whether your symptoms are caused by cataracts and whether surgery could benefit you.
Your specialist will ask about the changes you have noticed, how they affect your daily life and what you would like to improve. They will examine your eyes and assess your vision, including the health of the structures inside your eyes.
If surgery is being considered, measurements of your eye will help determine the appropriate power of the artificial lens implant. Your specialist will also discuss the procedure, its potential benefits and risks, and what to expect during recovery.
The assessment is an opportunity to ask questions and understand your options before deciding how to proceed.
You can find out more about preparing for private cataract surgery or book an appointment to discuss your concerns.
What if you have cataract symptoms but no cataract?
Blurred vision, glare, poor night vision and changes in colour perception are not exclusive to cataracts. Refractive errors, dry eye, retinal conditions and other eye problems can cause similar symptoms.
This is why it is important to have your eyes examined rather than relying on symptoms alone to diagnose a cataract.
If your specialist does not find a cataract, they can investigate other possible causes and advise you about suitable treatment or further assessment.
Frequently asked questions about cataract symptoms
What is usually the first sign of a cataract?
Blurred or cloudy vision is one of the most common early symptoms of cataracts. You may also notice increased glare, difficulty seeing at night or colours that look less bright. Symptoms often develop gradually, so changes can be easy to overlook at first.
Can you have cataracts without knowing it?
Yes. Early cataracts may not cause noticeable symptoms or interfere significantly with your vision. They may be discovered during a routine eye examination before you realise that your sight has changed.
Can cataracts make you need new glasses?
Yes. Cataracts can change how clearly you see and may cause your glasses prescription to change. However, new glasses may not fully correct the blur caused by a cataract. If your vision remains unclear, an eye examination can help identify the reason.
Can cataracts affect night driving?
Yes. Cataracts can cause glare from headlights and streetlights, reduce clarity in low light and make it harder to see road signs. If your vision is not clear enough for safe driving, avoid driving and seek professional advice.
Can cataracts cause headaches?
Cataracts do not usually cause headaches directly. However, changes in vision may contribute to visual discomfort for some people. Headaches can have many causes, so persistent or severe headaches should be assessed rather than automatically attributed to cataracts.
Do cataracts always need surgery?
No. Cataracts do not always need immediate treatment. If your vision is still adequate for your daily activities, your specialist may recommend monitoring them. Surgery may be considered when the cataract begins to affect your quality of life or visual needs.
How do I know if my cataract is getting worse?
You may notice increasing blur, more glare, worsening night vision, faded colours or greater difficulty with everyday tasks. Your glasses may also become less effective. An eye examination can assess whether the cataract has progressed and whether treatment should be considered.
Can cataract symptoms be treated without surgery?
Updated glasses, better lighting and other practical adjustments may help you manage some symptoms temporarily. However, these measures do not remove the cataract. If it significantly affects your vision, your specialist can explain whether surgery may be appropriate.
Take the next step
If you have noticed blurry vision, increased glare, difficulty seeing at night or other changes in your sight, an eye examination can help you understand what is happening.
You do not have to wait until your vision becomes severely affected to ask for advice. A specialist can assess your eyes, explain whether cataracts are responsible for your symptoms and discuss the options available to you.
Take the cataract suitability self-test to explore whether treatment may be suitable for you.
The right next step starts with understanding your vision and making an informed decision about your eye health.
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Mr Dan Nguyen
Consultant Eye Surgeon
I‘m your guide to better vision. In times when long waiting lists and unclear options are the norm, it’s easy to feel stuck and worried about your eye health. Don’t let that hold you back. I’m here to show you that you can skip the endless queues and make real progress. Remember, you’re unique, not just another name on a list. Every patient I see receives top-notch care, tailored to their specific needs and lifestyle.
