How risky is eye surgery really? The actual UK numbers

Patients deserve figures rather than reassurance. These are the rates I quote in clinic, drawn from UK national audit data and the published literature, together with what each one actually means for you.

Serious infection (endophthalmitis)

Approximately 1 in 1,000 to 1 in 3,000 cataract or lens replacement procedures in the UK, and lower still with intracameral antibiotics at the end of surgery. It is the complication everyone fears; it is also the one that is most reliably prevented by sterile technique and treated urgently when caught early — which is why 24/7 access to your surgeon matters.

Posterior capsule rupture

The national benchmark is under about 2%, and experienced high-volume surgeons typically report below 1%. Most cases are managed at the time of surgery with a good final visual result.

Retinal detachment

Around 1 in 200 to 1 in 500 after lens surgery over subsequent years, and higher in highly short-sighted eyes — an important part of the conversation for anyone considering lens replacement for high myopia.

Refractive surprise

The result landing away from target occurs in roughly 10–15% of eyes beyond 0.5 D. It is not dangerous, and it is usually correctable with a laser enhancement — but it is the most common source of disappointment, and it is heavily influenced by biometry quality and formula choice.

Capsule clouding

Around 20% of patients over five years. Treated with a two-minute YAG laser in clinic. Best classified as an expected late event rather than a complication.

Laser vision correction

Sight-threatening complications are estimated at well under 1 in 10,000 in screened patients. Flap complications occur in well under 1%, and enhancement rates are typically 2–5%.

Cystoid macular oedema

Swelling at the macula affects roughly 1–2% of eyes, more commonly in diabetic patients. It usually resolves with drops over several weeks.

How to read these numbers

Two things matter. First, context: twenty years of contact lens wear carries a cumulative risk of sight-threatening infection comparable to, or greater than, a single well-screened procedure. Second, these are averages — the surgeon's personal caseload, screening thoroughness and follow-up systems move them meaningfully in either direction.

The questions that reduce your personal risk

Who operates, what is their personal annual volume, what are their audited complication rates, what antibiotic protocol is used, and who is available if something changes at the weekend. Those five answers are worth more than any statistic on a website.

Where to go from here

If any of this sounds like your own experience, the sensible next step is a full diagnostic assessment with a consultant — not a sales appointment. Ms Tahmina Pearsall is a UK-trained NHS Consultant Ophthalmic Surgeon with more than 40,000 procedures behind her, and she personally performs every operation she plans. You can see current fixed prices, read verified patient reviews or book a consultation at any of the UK clinic locations.

This article is general information written by a consultant ophthalmic surgeon. It is not a substitute for a personal examination and individual medical advice.