Is laser eye surgery safe?

Laser eye surgery is one of the most studied elective procedures in modern medicine. Millions of treatments have been performed worldwide over the last three decades, and the safety profile of LASIK, LASEK/PRK and SMILE is now very well established.

The short answer

For suitable candidates, laser eye surgery is considered a safe, effective and predictable procedure. Large peer-reviewed studies consistently report patient satisfaction rates above 95%, with more than 99% of eyes achieving driving-standard vision or better after treatment.

What the evidence shows

The Royal College of Ophthalmologists, the American Academy of Ophthalmology and the US FDA have all reviewed long-term outcome data for laser refractive surgery. Serious sight-threatening complications are rare — typically quoted as fewer than 1 in 1,000 cases when performed by an experienced consultant on a properly selected patient.

Modern platforms (femtosecond lasers, wavefront-guided excimer profiles and SMILE) have significantly reduced the rate of flap complications, dry eye and night-vision disturbance compared with earlier generations of the technology.

What determines a safe outcome

Three factors matter far more than the specific laser used:

1. Careful patient selection. A detailed pre-operative assessment — including corneal topography, pachymetry, tear film analysis and refractive stability — is used to rule out anyone at higher risk of complications such as ectasia.

2. Surgeon experience. Outcomes are strongly linked to the individual surgeon's case volume and sub-specialty training in refractive surgery.

3. Post-operative care. Structured follow-up, dry-eye management and clear aftercare instructions protect the healing cornea and give the best long-term visual result.

Known risks to discuss at consultation

No surgical procedure is risk-free. The risks patients should understand before proceeding include temporary dry eye, glare or halos at night (usually settling within 3–6 months), under- or over-correction requiring an enhancement, and — very rarely — infection or corneal ectasia. These are all covered in detail during the pre-operative consultation.

Who is not a good candidate

Laser eye surgery is not appropriate for everyone. Common reasons to recommend an alternative (such as refractive lens exchange or an ICL) include thin or irregular corneas, very high prescriptions, unstable refractions, uncontrolled dry eye, certain autoimmune conditions, or pregnancy/breastfeeding at the time of assessment.

The bottom line

For the right patient, in the right hands, laser eye surgery is one of the safest elective procedures available today. The single most important step you can take is to have a thorough consultant-led assessment before committing to treatment — so any risk factors are identified early and the correct procedure is recommended for your eyes.

Book a consultation

Ms Tahmina Pearsall offers consultant-led refractive assessments across 17 UK locations. To arrange a full suitability assessment, please contact your nearest clinic via the contact page.