Most people who come to us about vision correction arrive already knowing one word: LASIK. It is the procedure that made laser vision correction a household idea, and for good reason.
But LASIK is not the only option, and it is not automatically the right one. Its close relative, PRK, corrects vision using the same underlying technology and reaches a comparable destination by a different route. For certain patients — and there are more of them than you might expect — PRK is the better choice.
Here is how the two compare, and how we help patients figure out which one fits.
What both procedures have in common
LASIK and PRK are both refractive surgeries, meaning they correct nearsightedness, farsightedness, and astigmatism by reshaping the cornea, the clear dome at the front of the eye. When the cornea’s curvature does not focus light precisely on the retina, vision is blurred. Both procedures use an excimer laser to remove a microscopically thin amount of corneal tissue and adjust that curvature.
Both are outpatient procedures. Both take only minutes per eye. Both use numbing drops rather than general anesthesia. And in appropriately selected patients, both have long track records and comparable visual results once healing is complete.
The difference is entirely in how the laser reaches the tissue it needs to reshape.
How LASIK works
The cornea has a thin outer layer called the epithelium. In LASIK, the surgeon first creates a hinged flap that includes this outer layer and some tissue beneath it. At Chico Eye Center this is done with a laser — the Intra-lase, or all-laser, approach — rather than a blade.
That flap is gently folded back, the excimer laser reshapes the cornea underneath, and the flap is laid back into place, where it adheres on its own without stitches.
Because the eye’s surface is restored immediately, comfort returns quickly and vision typically improves dramatically within a day or two. Many patients are back to routine activities the following day. That fast turnaround is the main reason LASIK is so widely known.
How PRK works
PRK skips the flap entirely. Instead, the surgeon removes the epithelium — the thin outer layer — and applies the same excimer laser directly to the corneal surface beneath. A protective bandage contact lens is placed over the eye while the epithelium grows back naturally over roughly three to five days.
That regrowth period is the trade-off. PRK involves more discomfort in the first week, and vision clears more gradually — often over several weeks, sometimes a few months, before it fully settles.
What PRK offers in exchange is significant: no flap. No flap means no flap-related complications, and it means more of the cornea is left structurally untouched.
Who tends to be a better fit for PRK
This is where the comparison stops being abstract. PRK is often the recommendation for:
Patients with thinner corneas. LASIK requires enough corneal thickness to safely create a flap and still leave a stable bed of tissue underneath. When the measurements do not allow for that, PRK may still be a safe option because it uses less tissue.
Patients with irregular corneal shape or surface conditions. Certain corneal topographies make a flap inadvisable.
Patients whose lifestyle carries impact risk. Contact sports, martial arts, military service, and some law enforcement and physically demanding occupations all raise the possibility of a blow to the eye. A flapless procedure removes flap displacement from the list of things to worry about. Some military branches and agencies prefer or require PRK for this reason — for naval and Marine aviators, for example, PRK is accepted where LASIK is disqualifying.
Patients with significant dry eye. LASIK’s flap creation temporarily affects corneal nerves involved in tear production, which can worsen dryness during healing. PRK’s effect on those nerves differs, and for some dry eye patients that matters.
Importantly, “you are not a LASIK candidate” is not the same as “you cannot have vision correction.” It very often means PRK, and sometimes it means a lens-based option such as Refractive Lens Exchange instead.
So which one is better?
Neither, in the abstract. The better procedure is the one that matches your corneas, your prescription, your eye health, and how you live.
That answer only comes from measurement. A refractive evaluation maps the shape and thickness of your cornea, measures your pupils, checks your tear film, confirms your prescription has been stable, and screens for anything that would make surgery inadvisable. Candidacy is a clinical determination, not a preference — and results vary from patient to patient, which is why an honest evaluation matters more than a sales pitch.
We will also tell you if the answer is no, or not yet. Some patients are better served by waiting for a prescription to stabilize, treating dry eye first, or considering a different approach entirely.
Why patients choose Chico Eye Center
Our surgeons have more than 25 years of experience, and Chico Eye Center is home to the most experienced Intra-lase LASIK and PRK surgeons in Northern California, as well as the only fellowship-trained refractive surgeon in Chico. Combined with cutting-edge technology and a full-service practice around it, that means your evaluation, your procedure, and your follow-up care all happen with one team that knows your eyes.
Our patients are also our friends, our neighbors, and our family, and we treat the decision that way. If you are curious whether laser vision correction is an option for you, the first step is simply finding out.
Schedule a consultation at Chico Eye Center by calling 530-895-1727 or booking online.