Do I Have Cataracts? Signs, Symptoms and When to Get Your Eyes Checked

Guide 1.1

Suitable for: Adults aged 50 years and above | Family members | Caregivers

If your vision has become blurrier, dimmer or less colourful than it used to be, you may be wondering whether cataracts are the cause. While cataracts are a common age related eye condition, they are not the only reason your eyesight can change.

This guide explains the common signs of cataracts, other conditions that can cause similar symptoms, and when it may be appropriate to arrange a comprehensive eye assessment.

Is This Guide Right for Me?

This guide is for you if:

• Your vision has gradually become blurrier or less sharp.

• Bright lights or oncoming headlights are becoming uncomfortable.

• Colours appear duller than they used to.

• A parent or loved one has recently noticed changes in their eyesight.

• You would like to understand whether your symptoms could be related to cataracts before arranging an eye assessment.

What Should I Do Next?

If...	Consider...
Your vision has changed slightly but does not affect daily activities	Arrange a routine eye examination and continue monitoring your vision.
Blurry vision, glare or reduced clarity is affecting reading, driving or everyday activities	Arrange a comprehensive eye assessment to identify the cause.
You experience sudden vision loss, severe eye pain, flashes of light with many new floaters, or a curtain like shadow over your vision	Seek urgent medical attention immediately. These symptoms are not typical of cataracts.

What You’ll Learn

After reading this guide, you’ll understand:

• What cataracts are and why they develop.

• The common signs and symptoms to look out for.

• How cataracts can affect everyday activities.

• Other eye conditions that may cause similar symptoms.

• When it may be appropriate to arrange an eye assessment.

Introduction

Many people notice gradual changes in their eyesight as they get older. Reading may become more difficult, night driving may feel less comfortable, or colours may seem less vibrant than before. Because these changes often develop slowly, it can be difficult to know whether they are simply part of ageing or the result of an eye condition such as cataracts.

Cataracts are one of the most common causes of reduced vision in older adults, but they are not the only possibility. Conditions such as glaucoma, age related macular degeneration and diabetic eye disease can also affect vision, sometimes with similar symptoms.

Understanding the difference is important because the right treatment depends on identifying the correct cause. This guide is designed to help you recognise the signs commonly associated with cataracts, understand when an eye assessment may be appropriate, and know when symptoms require more urgent medical attention.

01 What Are Cataracts?

A cataract is a gradual clouding of the eye’s natural lens.

The lens sits behind the coloured part of the eye, known as the iris, and helps focus light onto the retina so that you can see clearly. In a healthy eye, the lens remains transparent. As we age, natural changes within the lens cause it to become progressively less clear.

Instead of allowing light to pass through cleanly, the cloudy lens scatters light before it reaches the retina. This is why many people describe their vision as looking hazy, cloudy or as though they are looking through a fogged window.

Unlike an eye infection or an injury, cataracts usually develop slowly over several years. Because the changes happen gradually, many people adapt without realising how much their vision has changed until everyday activities become more difficult.

Age is the most common reason cataracts develop. Other factors may also contribute, including certain medical conditions, previous eye injuries, prolonged exposure to ultraviolet light and the long term use of some medications. Your eye doctor can explain whether any of these factors are relevant in your situation.

Although cataracts become increasingly common with age, not everyone experiences symptoms at the same rate. Some people continue with only minor changes for many years, while others notice that their vision begins to interfere with reading, driving or recognising faces much sooner.

02 Common Signs and Symptoms of Cataracts

Cataracts usually develop gradually, which means the earliest symptoms can be easy to overlook. Many people simply assume they need stronger glasses or that their eyesight is naturally getting worse with age.

Common symptoms include:

• Blurred, cloudy or hazy vision.

• Increased sensitivity to bright sunlight or headlights.

• Glare when driving at night.

• Colours appearing faded or yellowish.

• Needing brighter light for reading.

• Frequent changes to your glasses prescription.

• Halos around lights.

• Reduced contrast, making objects appear less distinct.

• Double vision in one eye, although this is less common.

Not everyone experiences every symptom. The type and severity of symptoms depend on where the cataract develops within the lens and how much it has progressed.

One characteristic feature of cataracts is that vision often changes gradually. You may not notice the difference day by day, but you may realise over time that reading has become harder, faces are less clear from a distance, or driving at night feels increasingly uncomfortable.

03 How Cataracts Can Affect Everyday Life

Vision affects almost every aspect of daily living, so even mild cataracts can gradually influence your confidence and independence.

• Many patients first notice changes during familiar activities.

• Reading may require brighter lighting or larger print.

• Night driving may become stressful because headlights create excessive glare.

• Watching television may feel less enjoyable because the picture appears dull or lacks sharpness.

• Recognising faces from across a room may become more difficult.

• Some people also find themselves avoiding activities they once enjoyed because they no longer feel confident seeing clearly.

Because these changes happen slowly, it is common for family members to notice them before the patient does. A spouse or adult child may comment that you are sitting closer to the television, avoiding driving after sunset or asking others to read labels and menus more frequently.

These are often useful clues that it may be time for an eye assessment.

04 Could It Be Something Else?

Although cataracts are a common cause of blurred vision, they are not the only possibility.

Several other eye conditions can produce similar symptoms, which is why it is important not to assume cataracts are the cause without a proper examination.

These include:

Refractive errors	Changes in your glasses prescription due to short sightedness, long sightedness or astigmatism can all cause blurred vision and may simply require updated spectacles.
Glaucoma	Glaucoma damages the optic nerve and often develops without obvious symptoms in its early stages. Many people are unaware they have glaucoma until significant vision has already been affected.
Age Related Macular Degeneration	AMD affects the central part of the retina and can make reading, recognising faces and seeing fine detail more difficult.
Diabetic Eye Disease	People living with diabetes may develop changes to the retina that can also reduce vision.

Because these conditions require different treatments, it is important not to rely on symptoms alone. A comprehensive eye assessment allows your eye care professional to determine the actual cause of your vision changes and recommend the most appropriate next step.

05 When Should You Arrange an Eye Assessment?

Many people assume they should wait until their vision becomes “bad enough” before seeing an eye doctor. In reality, there is no benefit in waiting for your eyesight to deteriorate significantly before arranging an assessment.

If you have noticed persistent changes in your vision that are affecting your daily activities, it is reasonable to have your eyes examined. An assessment can determine whether cataracts are responsible or whether another eye condition requires attention.

You may wish to arrange a comprehensive eye assessment if you have experienced any of the following:

• Gradually worsening blurry or cloudy vision.

• Increasing difficulty reading despite updated glasses.

• Glare or halos around lights, particularly when driving at night.

• Colours appearing duller or less vibrant.

• Frequent changes to your spectacle prescription.

• Difficulty recognising faces or seeing fine details.

• Reduced confidence when driving, walking down stairs or performing everyday tasks because of your vision.

Early assessment does not necessarily mean you need surgery. Many people with early cataracts continue to monitor their vision over time before treatment is considered. The purpose of an assessment is to understand what is causing your symptoms and discuss the options that may be appropriate for your individual circumstances.

06 What Happens During a Comprehensive Eye Assessment?

Many people feel reassured once they know what to expect during an eye assessment. The examination is generally straightforward and designed to identify the cause of your symptoms.

Although every patient is different, a comprehensive assessment commonly includes:

When Should You Seek Urgent Medical Attention?

Cataracts usually develop gradually and are not considered a medical emergency.

However, some vision changes require urgent assessment because they may indicate a different eye condition that needs prompt treatment.

Seek urgent medical attention if you experience:

• Sudden loss of vision in one or both eyes.

• A sudden increase in flashes of light together with many new floaters.

• A curtain or shadow moving across your vision.

• Severe eye pain.

• Sudden redness associated with pain and reduced vision.

• A sudden and significant deterioration in your eyesight.

These symptoms are not typical of cataracts and should not be ignored. Prompt assessment can be important in protecting your vision.

From Dr Seow Wei Hong

“Many people assume that blurry vision is simply part of getting older. While cataracts are common, similar symptoms can also be caused by other eye conditions. A comprehensive eye assessment helps us identify the underlying cause and discuss the most appropriate next steps based on your individual needs.”

Key Takeaways

• Cataracts are a common cause of blurry vision, glare and faded colours, particularly as we age.

• Similar symptoms can also be caused by other eye conditions, making a professional eye assessment important.

• Cataracts usually develop gradually, allowing many people to adapt without realising how much their vision has changed.

• A comprehensive eye assessment can identify the cause of your symptoms and determine whether monitoring or treatment may be appropriate.

• Sudden vision loss, severe eye pain or flashes with many new floaters are not typical of cataracts and require urgent medical attention.

Questions You May Wish to Ask Your Doctor

Preparing a few questions before your appointment can help you better understand your eye health and make informed decisions.

You may wish to ask:

• Are my symptoms likely to be caused by cataracts or another eye condition?

• How advanced are my cataracts?

• Is treatment recommended now, or is it reasonable to continue monitoring?

• How might cataracts affect my driving or daily activities?

• Are there any lifestyle changes that may help while I continue to monitor my vision?

• What follow up schedule would you recommend?

These questions can help guide your discussion and ensure your concerns are addressed during your consultation.

Frequently Asked Questions

What exactly is a cataract?

A cataract is a clouding of the eye’s natural lens that gradually reduces the amount of light reaching the retina, causing vision to become less clear.

How do I know if my blurry vision is caused by cataracts?

Blurred vision can result from several eye conditions. A comprehensive eye assessment is the most reliable way to determine the cause.

At what age do cataracts usually develop?

Cataracts become increasingly common with age and are frequently seen in adults over 50. However, the age at which symptoms become noticeable varies between individuals.

Can cataracts be prevented?

Ageing is the most common cause of cataracts, and there is no guaranteed way to prevent them. Your doctor can advise you on factors that may help support long term eye health.

Do cataracts improve on their own?

No. Cataracts generally develop gradually over time and do not reverse without treatment.

Can cataracts affect one eye only?

Yes. Cataracts may develop in one eye first or occur in both eyes at different rates.

Is it normal for my glasses prescription to keep changing?

Frequent changes to your prescription can occur for several reasons, including cataracts. An eye examination can help determine the cause.

How long do cataracts take to develop?

This varies from person to person. Some cataracts progress slowly over many years, while others may become more noticeable over a shorter period.

What symptoms should never be ignored?

Sudden vision loss, severe eye pain, flashes of light with many new floaters or a curtain like shadow over your vision require urgent medical assessment.

When should I arrange an eye assessment?

If your vision has changed and those changes are affecting your daily activities, it is sensible to arrange an assessment rather than waiting for your symptoms to worsen.

Continue Your Cataract Journey

Your eye care journey does not end with recognising the symptoms. Whether you’ve recently been diagnosed or are beginning to explore treatment options, these guides can help you understand what to expect at each stage.

Understanding Cataract Surgery Learn how cataract surgery is performed, who may benefit from treatment, what happens during the procedure and what to expect afterwards.	Read Guide →
Understanding Cataract Surgery Costs in Singapore Learn about cataract surgery costs, what may be included in a treatment package, MediSave eligibility, insurance claims and available payment options.	Read Guide →
Preparing for Cataract Surgery Find out how to prepare for surgery, what to bring on the day of your procedure and how to make your recovery as smooth as possible.	Read Guide →
Helping a Loved One Through Cataract Surgery Practical advice for family members and caregivers supporting someone before, during and after cataract treatment.	Read Guide →

Medical References

This guide has been prepared using current clinical knowledge and is intended for educational purposes. It should not replace a consultation with an ophthalmologist or other qualified healthcare professional.

The final published version should include references from authoritative sources such as:

Ministry of Health Singapore (MOH)

CPF Board (MediSave Scheme)

American Academy of Ophthalmology (AAO)

Royal College of Ophthalmologists

Singapore National Eye Centre

Peer reviewed ophthalmology literature relevant to cataract diagnosis and management

All clinical content should be reviewed and approved by the medical team at The Straits Eye Centre before publication.

In Summary

If you only remember three things from this guide, remember these:

• Blurry vision, glare and faded colours are common symptoms of cataracts, but they are not the only possible cause of vision changes.

• A comprehensive eye assessment is the most reliable way to determine why your vision has changed and whether cataracts are responsible.

• Sudden vision loss, severe eye pain or flashes of light with many new floaters are not typical of cataracts and require urgent medical attention.

→ Next Step

If you’ve noticed gradual changes in your vision or are wondering whether cataracts may be affecting your eyesight, arranging a comprehensive eye assessment is an appropriate next step. An examination can help identify the cause of your symptoms, determine whether cataracts are present and discuss the management options that may be suitable for your individual needs.

Concerned About Your Vision? Our ophthalmologists and Primary Eye Care Physicians provide comprehensive eye assessments to determine whether cataracts or another eye condition may be affecting your vision. Book a Comprehensive Eye Assessment Speak With Our Team

Your assessment may include: Discussion of your symptoms and medical history Vision testing Comprehensive examination of your eyes Personalised explanation of the findings Recommendations based on your individual needs