Risks and benefits of cataract operation

Overview

A cataract is a clouding of the natural lens inside your eye. This lens is normally clear and helps you focus. When it becomes cloudy, your vision gets blurry, like looking through a foggy window.

Yes, cataracts are extremely common, especially in people over 60. By age 80, more than half of all adults have either a cataract or have had cataract surgery.

Cataracts mainly affect older adults, but they can also occur in younger people, sometimes due to injury, certain medications, or health conditions like diabetes. Rarely, babies are born with cataracts.

Symptoms

Common symptoms

• Blurry or cloudy vision
• Colors appear faded or yellowed
• Difficulty seeing at night or in low light
• Glare or halos around lights
• Frequent changes in glasses or contact lens prescription

Symptoms in children

• White or grayish pupil (instead of black)
• Poor visual tracking (baby not following objects with eyes)
• Involuntary eye movements (nystagmus)
• Squinting or covering one eye

Symptoms in older adults

• Worsening blurriness that makes reading or driving difficult
• Increased sensitivity to glare from headlights or sunlight
• Needing brighter light for tasks
• Double vision in one eye

Causes

Main causes

• Aging – the most common cause, as lens proteins break down over time.
• Injury to the eye that damages the lens.
• Long-term use of certain medications, like steroids.
• Medical conditions such as diabetes.

Risk factors

• Being over 60 years old

When to see a doctor

See a doctor urgently if:

• Sudden vision loss or eye pain – seek immediate care.
• New flashes of light or a curtain-like shadow over your vision.

Book a routine appointment if:

• If you notice gradual blurry vision that affects daily activities like reading or driving.
• If you have trouble seeing at night or see halos around lights.
• If you are over 60 and have not had an eye exam in the past year.

Diagnosis

Your eye doctor will perform a comprehensive eye exam to check the health of your eyes and measure the cloudiness of your lens.

Tests that may be done

• Visual acuity test – reading letters on an eye chart.
• Slit-lamp exam – using a microscope with a bright light to see the lens and other parts of the eye.
• Retinal exam – dilating your pupils with eye drops to look at the back of your eye.
• Tonometry – measuring the pressure inside your eye.

What to expect at your appointment

The exam is painless. Your pupils will be dilated with drops, which may cause blurry vision and sensitivity to light for a few hours. Bring sunglasses and arrange for someone to drive you home.

Treatment

The only way to treat a cataract is with surgery to remove the cloudy lens and replace it with an artificial lens called an intraocular lens (IOL). Surgery is usually done when the cataract starts to interfere with your daily activities.

Self-care at home

• Use brighter lighting at home to make reading easier.
• Wear sunglasses to reduce glare.
• Use magnifying glasses for close work.
• Get a new eyeglass prescription if it helps temporarily.

Medical treatments

No medication or eye drop can cure a cataract. Surgery is the only effective treatment. The procedure is typically done under local anesthesia (numbing drops) and takes about 15-30 minutes. The cloudy lens is broken up with ultrasound (phacoemulsification) and removed, then an artificial lens is placed. Most people go home the same day.

Living with this condition

You can manage early cataracts with brighter light and stronger glasses. Once you have surgery, recovery is usually quick. You may need to avoid heavy lifting and water in your eye for a few weeks.

Lifestyle tips

• Wear sunglasses outdoors to protect your eyes from UV light.
• Eat a diet rich in antioxidants (fruits and vegetables) to support eye health.
• Quit smoking to slow cataract progression.
• Manage diabetes and other health conditions.

Diet and exercise

A healthy diet with plenty of green leafy vegetables, fruit, and omega-3 fatty acids may help eye health. Regular exercise helps control blood pressure and diabetes, which can reduce risk.

Mental health and emotional wellbeing

Prevention

There is no proven way to prevent cataracts, but you can reduce your risk by not smoking, protecting your eyes from UV light, eating a healthy diet, and managing health conditions like diabetes.

Screening programmes

Regular eye exams – at least every two years after age 60 – can detect cataracts early. If you have diabetes or a family history of eye disease, you may need more frequent check-ups.

Complications

If left untreated

• Gradual worsening of vision that may lead to blindness if severe.
• Increased risk of falls and accidents due to poor vision.
• Rarely, advanced cataracts can cause inflammation or increase eye pressure (glaucoma).

Long-term outlook

Cataract surgery is very successful. More than 95% of people regain good vision afterward. Serious complications are rare (less than 1 in 1000 cases). Even if untreated, vision loss from cataracts is not permanent – surgery can restore sight at any stage. With proper care, most people can return to their normal activities within a few weeks.

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