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Eye Surgery

Cataracts

Surgery types, recovery, NHS vs private options, and FAQs

Overview

A cataract is a clouding of the natural crystalline lens inside the eye, causing vision to become progressively blurred, misty, or faded. Cataracts are the most common cause of treatable sight loss in the UK, affecting an estimated 30% of adults aged 65 and over. The condition develops gradually over months or years as proteins in the lens break down and clump together, scattering light instead of focusing it clearly on the retina.

Cataract surgery is one of the most frequently performed and successful operations in the UK, with approximately 450,000 procedures carried out each year on the NHS. The operation involves removing the cloudy natural lens and replacing it with a clear artificial intraocular lens (IOL). Modern cataract surgery has a success rate of over 99%, and most patients experience a significant improvement in their vision within days.

While cataracts are predominantly age-related, they can also develop as a result of eye injuries, prolonged use of corticosteroid medications, diabetes, smoking, excessive UV exposure, and occasionally as a congenital condition. If you notice any gradual changes to your vision, booking an eye test is the essential first step towards diagnosis and treatment.

Symptoms

  • Blurred, cloudy, or misty vision that worsens gradually
  • Increased difficulty seeing in dim or very bright light
  • Colours appearing faded, washed out, or yellowed
  • Haloes or glare around lights, particularly when driving at night
  • Frequent changes to your glasses or contact lens prescription
  • Double vision in one eye (monocular diplopia)
  • Difficulty reading small print even with reading glasses

When Surgery is Needed

Cataract surgery is recommended when your cataracts begin to interfere with your daily activities and your quality of life. In the early stages, updated glasses or stronger lighting may help you manage, but surgery is the only treatment that can remove a cataract.

Your ophthalmologist or optometrist will typically recommend surgery when:

  • Your vision can no longer be adequately corrected with glasses
  • You have difficulty driving, reading, watching television, or recognising faces
  • Glare and haloes make night driving unsafe
  • Your cataracts are affecting your ability to work or enjoy hobbies
  • A cataract is preventing treatment or monitoring of another eye condition, such as diabetic retinopathy or macular degeneration

There is no medical benefit to waiting until a cataract is "ripe" or fully developed. Modern surgical techniques allow cataracts to be removed at any stage, and earlier intervention often leads to a smoother procedure and faster recovery.

Types of Surgery

Phacoemulsification (standard cataract surgery)

The most common technique in the UK. A tiny incision (2-3mm) is made in the cornea, and an ultrasound probe is used to break up the cloudy lens into small fragments, which are then gently suctioned out. A clear artificial intraocular lens (IOL) is folded and inserted through the same small incision. The procedure typically takes 15-30 minutes under local anaesthetic eye drops, and stitches are rarely needed.

Femtosecond laser-assisted cataract surgery

A laser is used to perform some of the key steps of cataract surgery, including creating the corneal incision, opening the lens capsule, and softening or fragmenting the cataract before removal. This technology may improve precision, particularly for patients requiring toric or premium lenses. It is typically offered as a private upgrade.

Extracapsular cataract extraction (ECCE)

Used less frequently today, this technique involves a larger incision to remove the cloudy lens in one piece. It may be recommended for very dense or advanced cataracts that cannot be easily broken up with ultrasound. Recovery time is longer and stitches are usually required.

Refractive lens exchange

The same surgical procedure as cataract surgery, but performed on a clear lens that has not yet developed a cataract. It is typically a private procedure chosen by patients over 50 who wish to reduce their dependence on glasses or contact lenses and prevent future cataract development.

Recovery

Cataract surgery recovery is generally straightforward. Most patients notice a significant improvement in their vision within 24 to 48 hours, although complete healing typically takes 4 to 6 weeks.

After the procedure, you will be given a clear plastic eye shield to wear overnight for the first week, along with antibiotic and anti-inflammatory eye drops to use for several weeks. You should avoid rubbing your eye, swimming, and heavy lifting for at least two weeks. Most people can return to normal daily activities, including light work, within a few days.

You will have a follow-up appointment, usually within 1 to 4 weeks of surgery, to check that your eye is healing properly. A new glasses prescription, if needed, is typically issued around 4 to 6 weeks after the operation once your vision has fully stabilised.

Serious complications are rare, occurring in fewer than 2% of cases. The most common complication is posterior capsule opacification (PCO), where the lens capsule becomes cloudy months or years later. This is easily and permanently treated with a quick YAG laser procedure.

NHS vs Private

Cataract surgery is available free on the NHS when your cataracts are significantly affecting your daily life. Your GP or optometrist can refer you to an NHS ophthalmology service, and waiting times vary by region but are typically between 6 and 18 weeks. NHS surgery uses a high-quality standard monofocal lens, which corrects vision at one distance (usually distance).

Private cataract surgery offers several advantages, including shorter waiting times (often within 1-2 weeks), a wider choice of premium lens implants (multifocal, toric, extended depth of focus), choice of consultant surgeon, and more flexible appointment scheduling. Private costs typically range from £2,295 to £3,995 per eye, depending on the lens chosen and the provider.

Many private providers also offer interest-free finance plans, making premium options more accessible. Some patients choose to have NHS surgery in one eye and private surgery with a premium lens in the other.

Frequently Asked Questions

Is cataract surgery painful?
No. Cataract surgery is performed under local anaesthetic eye drops that numb the eye completely. You may feel a slight pressure or awareness of movement, but the procedure itself is painless. Most patients report only mild discomfort, such as a gritty sensation, in the hours following surgery.
How long does cataract surgery take?
The surgical procedure itself typically takes between 15 and 30 minutes. However, you should allow approximately 2 to 3 hours for your entire visit, including pre-operative preparation, the surgery, and a short period of post-operative observation before you are discharged.
Will I need glasses after cataract surgery?
This depends on the type of intraocular lens implanted. A standard monofocal lens, used in NHS surgery, corrects distance vision, so you will typically still need reading glasses. Premium multifocal or extended depth of focus lenses can reduce or eliminate dependence on glasses for both distance and near vision, though some patients may still prefer glasses for prolonged close work.
Can cataracts come back after surgery?
No. Once a cataract has been removed and replaced with an artificial lens, it cannot return. However, up to 10-20% of patients develop posterior capsule opacification (PCO), sometimes called a 'secondary cataract', where the membrane behind the lens becomes cloudy. This is quickly and permanently treated with a painless YAG laser procedure.
What is the difference between NHS and private cataract surgery?
The surgical technique is essentially the same. The main differences are waiting times (private is typically much faster), lens choice (private offers premium multifocal and toric lenses), and flexibility in choosing your surgeon and appointment times. NHS surgery uses a high-quality monofocal lens and is completely free of charge.
Can both eyes be done at the same time?
In the UK, each eye is usually operated on separately, with a gap of 1 to 4 weeks between procedures. This allows the first eye to heal and your vision to stabilise before treating the second. Simultaneous bilateral cataract surgery (SBCS) is occasionally offered by some private clinics but remains uncommon.

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