Quick Answer
Yes, LASIK is one of the safest elective surgical procedures available. Clinical data spanning 30 years shows a patient satisfaction rate of 95–96%, a serious complication rate below 1%, and no documented cases of permanent blindness directly caused by a properly performed LASIK procedure. Safety is strongly correlated with candidate selection, surgeon experience, and the technology used.
Detailed Explanation
LASIK has been performed on more than 40 million eyes worldwide since FDA approval in 1999. That volume of outcomes data makes it one of the most thoroughly studied elective surgical procedures in medicine. The safety profile is well-established — but it is not without nuance.
What the evidence actually shows:
The American Refractive Surgery Council and peer-reviewed literature consistently report:
- 96% of patients achieve their desired vision outcome
- Serious, vision-threatening complications occur in fewer than 1% of cases
- Patient dissatisfaction rates run between 1–3% across large outcome studies
- Dry eye is the most commonly reported side effect, affecting 20–55% of patients in the short term, resolving in most within 6–12 months
The FDA’s role in LASIK safety:
The FDA regulates both the laser devices used in LASIK and the pre-market approval process. Current-generation excimer lasers are approved for specific prescription ranges and corneal thickness minimums. Procedures performed within FDA-approved parameters carry substantially lower risk.
How surgeon experience affects safety:
A 2022 analysis published in the Journal of Refractive Surgery found complication rates were significantly higher among surgeons performing fewer than 200 procedures per year compared to high-volume refractive surgeons (500+ per year). Experience matters — not just training, but ongoing practice volume.
Technology’s contribution to safety:
Modern wavefront-guided and topography-guided platforms are measurably safer than the systems available in the early 2000s. Iris-tracking technology compensates for involuntary eye movement during the procedure. Femtosecond lasers create more precise, reproducible flaps than mechanical microkeratomes. Patients researching safety should ask specifically which platform a practice uses.
The screening process is where safety begins:
Approximately 15–20% of patients who seek LASIK are not good candidates. Thin corneas, irregular corneal shape (including subclinical keratoconus), extreme prescriptions, and certain systemic conditions disqualify patients. A rigorous pre-operative evaluation — including corneal topography, pachymetry, and wavefront analysis — is the first and most critical safety gate.
Practices recognized by LASIK Surgery Awards are evaluated on the thoroughness of their screening protocols, because excluding the wrong patients is as important as treating the right ones.
What “serious complications” actually means:
The complications that do occur and can have lasting impact include:
- Irregular astigmatism from a decentered ablation or flap complication
- Corneal ectasia — a progressive thinning of the cornea that can occur in patients with undetected keratoconus or insufficient residual corneal tissue
- Persistent dry eye disease beyond 12 months
- Halos and glare that do not resolve, particularly in patients with large pupils
Each of these is rare in properly screened, expertly treated patients. Each is substantially more common when screening is inadequate.
Important Considerations
“Safe” is not the same as “risk-free.” Every surgical procedure carries some level of risk. The question is whether the benefit-to-risk ratio is favorable for your specific anatomy, lifestyle, and expectations. For most healthy adults with stable prescriptions, it is.
Online horror stories are real but unrepresentative. Patients who experience complications are far more likely to share their experience publicly than the 96% who are satisfied. This creates a distorted perception of LASIK’s risk profile. Both the success stories and the cautionary tales deserve to be understood in context.
Keratoconus is the disqualifying condition most often missed. Early-stage or subclinical keratoconus can be difficult to detect without advanced corneal tomography. Some older screening protocols do not catch it. If a practice’s pre-operative workup does not include Scheimpflug imaging or anterior-segment OCT, ask why.
Long-term safety data supports LASIK. A 25-year follow-up study published in Ophthalmology found no significant deterioration in outcomes for patients treated with early-generation LASIK — and modern platforms perform measurably better than those systems.
What to Do Next
1. Schedule a comprehensive LASIK evaluation at a practice that uses advanced corneal imaging — not just a topographer, but a full tomographic workup. 2. Ask the surgeon directly about their complication rates, enhancement rates, and dry eye protocol. 3. Be honest about your eye history. Disclose any family history of keratoconus, prior eye injuries, autoimmune conditions, or current dry eye symptoms. This information is critical to accurate risk assessment. 4. Compare two or more surgical evaluations before committing. A good surgeon will welcome the comparison.
For guidance on evaluating surgeon credentials and facility standards, see What to Look for in a LASIK Surgeon.
Related Questions
Curious about specific side effects and how common they are? Read What Are the Side Effects of LASIK? for a complete breakdown of what to expect and how long symptoms typically last.
Worried about the worst-case scenario? See Can You Go Blind from LASIK? for a fact-based look at the most serious risk patients ask about.
Wondering what would happen if your results aren’t ideal? Read What Happens If LASIK Fails? for a clear-eyed look at retreatment options and outcomes.