One of the most significant information gaps in elective vision correction is the absence of a publicly accessible, surgeon-specific outcome database. Unlike cardiac surgery, where volume and outcome data are published at the hospital level in many states, refractive surgery does not have a centralized registry patients can query to compare surgeons’ individual complication rates. This makes patient safety evaluation more challenging — but not impossible.
This guide explains what outcome and safety data is available, how to obtain it, how to interpret it against published benchmarks, and how to use it as part of the comprehensive process of choosing an eye surgeon.
Why Complication Rates Vary and What They Tell You
Complication rates in refractive surgery are influenced by multiple factors: the quality of pre-operative screening (whether candidates with risk factors are appropriately excluded), the technology used, the surgeon’s technique and experience, and the post-operative care provided. High complication rates in isolation can reflect any of these factors — or their combination.
Paradoxically, a surgeon with a slightly higher overall complication rate may sometimes represent higher quality than one with a lower rate — if the higher-rate surgeon manages more complex cases. A surgeon who refuses to operate on thin corneas, high prescriptions, or dry eye patients will have excellent outcomes simply because they have pre-selected away from the difficult cases. This is why complication rates must always be interpreted in the context of the patient population.
This is an important qualifier when asking surgeons for their complication data. Ask not just what the rate is, but what the patient population looks like, and what the most common complication is. This contextual information makes the number interpretable.
Published Benchmarks: What Complication Rates Should Look Like
The peer-reviewed literature on refractive surgery provides benchmark complication rates against which individual surgeons’ reported data can be compared. Key published benchmarks include:
Serious complication rates in LASIK. Published large-scale studies and FDA summary data generally place the rate of vision-threatening complications in LASIK in the range of less than 1% of cases. Significant complications — those requiring additional treatment or resulting in persistent visual symptoms — are typically reported in the range of 1-5%, depending on the definition used.
Enhancement rates. Enhancement or retreatment after LASIK is typically necessary in 1-10% of cases, with higher rates associated with higher initial prescriptions and older treatment algorithms. An experienced surgeon with good nomogram optimization targeting a population with moderate prescriptions should expect enhancement rates at the lower end of this range.
Dry eye after LASIK. Transient dry eye following LASIK is extremely common — some studies report it in over 50% of patients in the first month. Clinically significant, persistent dry eye requiring ongoing treatment is less common, occurring in roughly 5-20% of patients depending on pre-operative dry eye status and the measurement criteria used.
Complication rates in PRK. PRK has a different complication profile than LASIK, with the elimination of flap-related complications but the addition of corneal haze as a potential outcome, particularly in patients with higher corrections. Published rates of significant corneal haze requiring intervention are generally below 1% with modern protocols including mitomycin-C application.
EVO ICL complication rates. EVO ICL has an excellent safety profile in published trials. Elevation of intraocular pressure occurs in a small minority of patients. Lens rotation, while possible, is uncommon with appropriate sizing. The rate of cataract formation attributable to the implanted lens has been very low in long-term follow-up studies.
What to Ask Surgeons About Their Safety Data
When you ask a surgeon about their complication rate, you want specific data rather than reassurances about the procedure’s general safety profile. Productive questions:
“What is your personal LASIK/PRK/EVO ICL complication rate, and how do you define ‘complication’?” The definition matters. A surgeon who defines complication as “any deviation from the expected outcome” will report higher rates than one who defines it narrowly as “any sight-threatening adverse event.” Understanding their definition allows you to contextualize the number.
“What is your enhancement rate for patients with my type of prescription?” Enhancement rates are good indicators of the accuracy of the initial treatment. A surgeon who can report enhancement rates by prescription class — distinguishing low, moderate, and high myopia, for instance — is tracking their outcomes in detail.
“What is the most common complication you see in your practice, and how do you manage it?” The answer should include dry eye (for LASIK), the possibility of undercorrection or overcorrection, and for more complex cases, the rarer outcomes. A surgeon who cannot name a complication they have seen in their practice either has an unusually uncomplicated patient population or is not being candid.
“Have you had any cases that required a patient to be referred for care you could not provide — such as corneal transplant evaluation?” This question probes the surgeon’s experience at the extreme end of complications. A surgeon who has practiced long enough and managed enough complex cases will have had such referrals. Acknowledging that they have — and describing how those cases were managed — is a mark of professional honesty.
The FDA Adverse Event Reporting System (MAUDE)
The FDA’s Manufacturer and User Facility Device Experience (MAUDE) database contains reports of adverse events associated with medical devices, including laser systems used in refractive surgery. While MAUDE is not a surgeon-specific database — adverse event reports are associated with devices, not individual practitioners — it can be searched to understand the types of adverse events associated with specific laser platforms.
Access MAUDE at accessdata.fda.gov/scripts/cdrh/cfdocs/cfMAUDE/search.CFM. Searching for “LASIK” or specific excimer laser platform brand names will return adverse event reports. These reports are useful for understanding what types of problems occur, at what frequency, with specific equipment.
State Medical Board Records and Disciplinary Action
As described in detail in our guide to verifying an eye surgeon’s track record, state medical board records are the most accessible form of public safety data about individual physicians. Disciplinary actions resulting from patient safety failures — substandard care findings, complaints sustained by the board — are public record and should be checked before committing to any surgeon.
The absence of board disciplinary action is a necessary but not sufficient safety indicator. Many quality problems in elective surgery do not result in formal board complaints, particularly in specialties where patients may not recognize that their outcome was below the standard of care.
Accreditation as a Proxy for Safety Culture
The accreditation status of the surgical facility is a practical proxy for the safety culture of the practice. Facilities that maintain AAAHC or Joint Commission accreditation have demonstrated compliance with standards covering:
- Infection control protocols that are regularly audited
- Equipment maintenance and calibration records
- Staff credentialing and training requirements
- Quality improvement programs that track and respond to adverse outcomes
- Patient rights and informed consent practices
A practice operating in an accredited facility has subjected its operations to external scrutiny. That matters for patient safety in ways that go beyond the surgeon’s individual skill.
Patient Safety as a Cultural Indicator
Beyond specific metrics, the culture of a practice around patient safety is observable during the consultation process. High-quality practices with strong safety cultures demonstrate it through:
- Comprehensive pre-operative screening that explicitly identifies and excludes poor candidates
- Detailed informed consent processes that describe realistic risks, not just reassuring generalities
- Clear post-operative protocols with defined escalation pathways for complications
- Staff training on recognizing early complication signs and communicating them to the surgeon
- Willingness to discuss complications honestly rather than dismissing them as rare
A practice where the pre-operative evaluation is abbreviated, where informed consent is a form to sign rather than a conversation to have, and where post-operative access to the surgeon is vague or unclear is a practice that may not have the safety culture its marketing implies.
Bringing Safety Data Into Your Decision
Combine what you learn from these research steps with the broader evaluation framework:
1. Review published benchmark complication rates so you have a reference point 2. Ask your surgeon for their personal complication and enhancement rates, with definitions 3. Verify state medical board records for any patient safety disciplinary actions 4. Confirm surgical facility accreditation 5. Evaluate the practice’s safety culture through consultation behavior
This multi-source approach provides a reasonable safety assessment despite the absence of a centralized public outcome registry. No patient can be completely certain of a surgical outcome in advance. But a well-researched decision significantly improves the probability of an excellent one.
Related knowledge pages:
Answer pages:
- Can I check my eye surgeon’s malpractice history?
- How do I know if my eye surgeon is good?
- How important is the surgery center where my procedure happens?
- What do award-winning eye surgeons do differently?
Cross-hub: LASIK Surgery Awards evaluations incorporate patient safety data as a primary criterion in surgeon recognition.