LASIK Complications: What Can Actually Go Wrong and How Rare It Is

Why an Honest Risk Discussion Matters

LASIK is one of the most studied elective procedures in medicine, with over 40 million procedures performed worldwide and satisfaction rates consistently above 96% in large-scale studies. But no surgery is risk-free, and understanding what can go wrong — and how rarely it does — is essential for making an informed decision.

Be cautious of any clinic that dismisses risks entirely or claims the procedure is "100% safe." Equally, don't let rare complication statistics scare you away from a procedure with one of the highest satisfaction rates in all of elective medicine.

Common Side Effects (Not Complications)

These are expected parts of the healing process, not complications. Nearly every LASIK patient experiences some or all of them temporarily.

Dry eye affects the majority of patients for the first one to three months as corneal nerves regenerate. It's managed with preservative-free artificial tears and typically resolves fully. Halos and glare around lights at night are common for the first two to four weeks, especially with larger pupil sizes. Mild fluctuation in vision clarity during the first month as the cornea stabilizes. Light sensitivity for the first few days post-procedure.

Actual Complications: Incidence and Management

How Modern Technology Reduces Risk

If you had LASIK in 2005 and are comparing those risks to 2026, you're working with outdated numbers. Three specific advances have meaningfully reduced complication rates.

Femtosecond laser flaps

The flap was historically created with a mechanical blade (microkeratome). Femtosecond lasers create thinner, more uniform, more precise flaps — reducing the incidence of flap complications from roughly 1–2% to under 0.5%. Virtually all reputable clinics in Colombia now use femtosecond flap creation exclusively.

Wavefront-guided ablation

Custom ablation profiles based on your eye's unique optical map reduce the incidence of post-operative higher-order aberrations (the optical distortions that cause halos and glare). Compared to earlier conventional treatments, wavefront-guided LASIK produces better contrast sensitivity and night vision.

Better screening

The most serious potential complication — corneal ectasia — is almost entirely preventable through proper screening. Modern corneal topography and tomography can identify at-risk corneas before surgery. The vast majority of ectasia cases in the literature occurred in patients who had undetected risk factors that current screening protocols would catch.

What If Something Goes Wrong in Colombia?

This is the legitimate concern for medical tourism patients. Most complications are manageable issues that arise in the first week — when you're still in the country and in direct contact with your surgical team. The standard post-op protocol includes a next-day evaluation and a one-week check before you fly home.

For the rare issue that develops after returning home, Colombian clinics experienced with international patients maintain virtual follow-up protocols: photo submissions, video consultations, and partnerships with ophthalmologists in the patient's home country. Enhancement procedures, if needed, are typically scheduled three to six months later — plenty of time to plan a brief return trip.

Ask your surgeon during consultation: "What happens if I need follow-up care after I go home?" Their answer will tell you a lot about how seriously they take their international patient protocol.