Neither PRK nor LASIK is universally better. Both use the same excimer laser to reshape your cornea and correct vision, and both achieve similar final outcomes. The difference is in how the surgeon accesses the cornea, which changes the recovery experience, risk profile, and who qualifies for each procedure. Your eye anatomy, lifestyle, and tolerance for a longer recovery period determine which one is the better fit.
How the Two Procedures Differ
LASIK and PRK diverge in a single, critical step: what happens to the surface of your cornea before the laser does its work.
In LASIK, the surgeon uses a femtosecond laser to cut a thin flap in the outer layer of the cornea, leaving a hinge on one side. That flap is folded back, the underlying tissue is reshaped with a laser, and the flap is laid back into place. It acts like a natural bandage, which is why healing is fast.
In PRK, there is no flap. The surgeon removes the outermost layer of the cornea (the epithelium) entirely, then reshapes the exposed tissue with the same laser. Your epithelium regenerates on its own over about five days. A bandage contact lens protects the eye while it heals.
Recovery: LASIK Is Dramatically Faster
This is the biggest practical difference between the two procedures, and it’s not close. With LASIK, most people see clearly within 24 hours and can return to work the next day.
PRK recovery is a different experience. The first three days tend to be the hardest. One patient account from the Cleveland Clinic described keeping their eyes closed about 90% of the time during days two and three. By day four, they could keep their eyes open comfortably. At the one-week follow-up, their vision was still only 20/50 in one eye and 20/60 in the other. Comfortable screen use and driving didn’t return until weeks two through six. Full visual sharpness can take three months or longer to stabilize, at which point outcomes are comparable to LASIK (20/20 or better for most patients).
If you can’t take a week or more off work, or you need both eyes functional quickly, LASIK’s recovery timeline is a significant advantage.
Pain After PRK
LASIK causes minimal discomfort, typically just a few hours of scratchiness. PRK is genuinely painful for some people. Post-PRK pain typically increases quickly on the day of surgery, peaks between days one and three, then gradually fades as the surface layer regrows. For most patients, the worst is over by about 96 hours. Surgeons prescribe numbing drops, oral pain relievers, and sometimes additional medications to manage this window, but it’s the part of PRK that catches people off guard.
Dry Eye Risk Favors PRK
LASIK’s corneal flap cuts through more of the nerves that help your eyes sense dryness and produce tears. This makes post-surgical dry eye more common after LASIK. A study cited by the American Academy of Ophthalmology found that 52.4% of LASIK patients developed clinically significant dry eye in the first six months, compared with 38.7% of PRK patients. For most people, this dry eye is temporary. But if you already struggle with dry eyes, PRK’s lower rate of nerve disruption is worth considering.
Flap Risks vs. Haze Risk
Each procedure carries a unique complication that the other avoids entirely.
LASIK’s flap never fully fuses back to the cornea. In rare cases, it can shift or develop complications like epithelial ingrowth, where surface cells grow underneath the flap edge. The risk depends partly on surgical technique and how well the flap aligns with the underlying tissue. Trauma to the eye months or years later can theoretically dislodge the flap, though this is uncommon in everyday life.
PRK’s signature risk is corneal haze, a faint cloudiness that can develop as the surface heals. The incidence is low, around 1.3% for first-time PRK. Surgeons now routinely apply a brief treatment during the procedure to prevent haze formation, which has made this complication even rarer. Higher prescriptions that require deeper tissue removal carry a slightly elevated haze risk.
Who Qualifies for Each Procedure
PRK is available to a wider range of patients because it doesn’t require enough corneal thickness to safely create a flap and still leave adequate tissue underneath. For LASIK, most surgeons want at least 300 microns of corneal tissue remaining after the flap is cut and the laser reshaping is done. That means people with naturally thin corneas, or those with high prescriptions requiring more tissue removal, may not qualify for LASIK but can still safely have PRK.
Corneas thinner than about 480 to 500 microns start raising flags on the risk scoring systems surgeons use when evaluating LASIK candidates. If your surgeon tells you your corneas are too thin for LASIK, PRK is typically the recommended alternative, not a lesser option.
Contact Sports and Physical Jobs
The absence of a flap gives PRK a structural advantage for people who face regular physical contact or impact to the face. Boxers, martial artists, and anyone in a role where a blow to the eye is plausible may prefer the peace of mind that comes with no flap to displace.
Military branches historically favored PRK over LASIK for pilots and aircrew, partly due to concerns about flap complications during high-altitude ejection. The U.S. Air Force has since noted that studies showed little to no effect on corneal flaps in those scenarios, and both procedures are now accepted without waivers. Still, the perception persists, and some candidates in physically demanding roles choose PRK to eliminate the concern altogether.
Long-Term Visual Outcomes
Once healing is complete, PRK and LASIK produce virtually identical visual results. Both correct the same range of nearsightedness, farsightedness, and astigmatism. Both achieve 20/20 vision or better in the vast majority of patients. The laser doing the actual reshaping is the same in both procedures. The difference is only in how the cornea’s surface is handled before and after that laser step.
If you need an enhancement (a touch-up procedure years later), having had PRK the first time can simplify things. With prior LASIK, a surgeon retreating with PRK faces a slightly higher haze risk of about 2.7%, roughly double the baseline rate.
Cost Comparison
PRK is generally less expensive than LASIK. The national average for LASIK is about $2,250 per eye, or roughly $4,500 for both. PRK pricing varies but typically comes in a few hundred dollars lower per eye. The difference reflects the additional technology involved in creating the LASIK flap. Neither procedure is covered by most insurance plans, so the out-of-pocket savings with PRK can matter.
Which One Is Right for You
Choose LASIK if you want the fastest possible recovery, minimal pain, and your corneas are thick enough to qualify. Choose PRK if you have thin corneas, chronic dry eyes, a physically demanding lifestyle, or you’re comfortable trading a longer recovery for the structural benefit of no flap. The final visual result will be the same either way. The question isn’t really which procedure is better overall. It’s which tradeoffs matter more to you.