Laser vision correction includes several procedures — LASIK, PRK, and SMILE are the main ones — that all use lasers to reshape the cornea, but they differ in how the laser reaches the treatment area. Understanding these differences helps you compare options, ask better questions at a consultation, and interpret price differences between clinics.
The Family Tree of Laser Vision Correction
All laser vision correction procedures share the same goal: changing the cornea's shape so light focuses correctly on the retina. Where they differ is in surgical approach — specifically, how the surgeon accesses the corneal tissue the laser will reshape. That single design difference produces the main trade-offs between procedures: recovery experience, suitability for different corneas, and cost.
It helps to think of the procedures as siblings rather than rivals. Each was developed to solve particular limitations of the others, and each remains the better choice for certain eyes. A clinic that offers only one procedure can only recommend that one; a consultation that covers several options gives you a fuller picture. When comparing providers, asking which procedures they offer — and which they recommend for your specific measurements — is one of the most informative questions you can ask.
For readers starting from zero, our guides to what LASIK is and how it works cover the best-known procedure in depth.
LASIK: The Flap-Based Standard
LASIK is the most widely performed laser vision correction procedure. As described in our procedure guide, the surgeon creates a thin hinged flap in the cornea, folds it back, applies the excimer laser to the exposed tissue, and repositions the flap. The flap adheres naturally without stitches.
LASIK's defining advantage is the recovery experience it is known for: vision often improves noticeably within a day, and post-procedure discomfort is commonly described as mild. Its defining requirement is sufficient corneal thickness and a healthy corneal structure to support the flap — which is why the pre-operative measurements matter so much, and why some people are told LASIK is not their best option.
Technology variations within LASIK — conventional versus wavefront-guided or topography-guided treatments, and microkeratome versus femtosecond laser for flap creation — add further nuance. These variations can affect both suitability and price, a topic we explore in what affects the cost of LASIK. When a clinic quotes "LASIK," always confirm which specific technology the quote covers.
PRK: The Original Surface Procedure
PRK (photorefractive keratectomy) predates LASIK and takes a different approach: instead of creating a flap, the surgeon removes or loosens the thin outer layer of the cornea (the epithelium) and applies the excimer laser directly to the surface. The outer layer then regrows naturally over the treated area during healing.
Because there is no flap, PRK avoids flap-related considerations entirely. It is often discussed for people with thinner corneas, certain corneal irregularities, or lifestyles and occupations where a flap might be a concern — for example, contact sports or military service, though individual assessment always governs. The trade-off is the recovery: the surface needs time to heal, so visual recovery is generally slower than with LASIK and the early post-procedure period is commonly described as less comfortable.
PRK is sometimes priced differently from LASIK — occasionally lower, occasionally similar — depending on the clinic's pricing structure. Our detailed guide on PRK as a LASIK alternative covers the procedure, its candidacy considerations, and its cost position in depth.
SMILE: The Small-Incision Approach
SMILE (small incision lenticule extraction) is a newer flap-free technique. Instead of creating a flap or removing the surface layer, the surgeon uses a femtosecond laser to create a thin, lens-shaped piece of tissue (a lenticule) inside the cornea, then removes it through a small incision. Removing the lenticule changes the cornea's shape and therefore its focusing power.
SMILE is generally discussed as combining elements of both older procedures: no flap like PRK, but a recovery experience often described as closer to LASIK's. Availability is more limited than LASIK or PRK — fewer clinics offer it, and not all refractive errors or prescriptions are treated with it in every setting. Because it is newer and less widely available, pricing and provider experience vary more. If SMILE interests you, the key questions are whether the clinic performs it regularly, which prescriptions they treat with it, and how its price compares to their LASIK offering.
How the Procedures Compare
A side-by-side comparison helps clarify the practical differences:
- Surgical approach: LASIK uses a flap; PRK treats the surface; SMILE removes a lenticule through a small incision.
- Recovery profile: LASIK is generally known for the quickest visual recovery; PRK's is slower with more early discomfort; SMILE is often described as intermediate, closer to LASIK.
- Corneal requirements: PRK is often discussed for thinner corneas since no flap tissue is involved; LASIK requires sufficient thickness for the flap plus the treatment; SMILE has its own thickness and prescription parameters.
- Availability: LASIK is the most widely offered; PRK is widely available; SMILE is offered by fewer providers.
- Long-term considerations: All three aim for lasting corneal reshaping, but eyes change over time regardless of procedure, and enhancements or later vision changes are possible with any of them.
None of these comparisons should be read as a recommendation. The right procedure depends on your corneal measurements, prescription, lifestyle, and the surgeon's assessment — which is exactly what the consultation evaluates. Our guide on candidacy explains the general factors, though each procedure has its own specific criteria.
Beyond Lasers: Other Vision Correction Options
Laser procedures are not the only alternatives to glasses and contacts. Implantable collamer lenses (ICL) place a corrective lens inside the eye without removing corneal tissue — an option sometimes discussed for prescriptions or corneas that do not suit laser procedures. Refractive lens exchange replaces the eye's natural lens, an approach sometimes discussed alongside cataract-age considerations. And of course, glasses and contact lenses remain valid, non-surgical options with their own cost and lifestyle profiles.
Our alternatives section covers ICL and other non-laser options, while our comparison of glasses and contacts versus laser vision correction frames the broader decision. The point of knowing the full menu is not to talk yourself into the most advanced option — it is to make sure the option you choose was chosen from the complete set, for your eyes specifically.
Cost Differences Between Procedures
Procedure choice affects price, but not in a simple "newer equals more expensive" way. Clinics set their own pricing structures: some price LASIK, PRK, and SMILE identically; others charge more for wavefront-guided treatments or for SMILE; PRK is sometimes positioned as the lower-cost option. Technology, surgeon experience, and regional market norms all feed into the quote.
What matters more than the general pattern is the specific quote you receive. Ask for the price of each procedure you are a candidate for, itemized to show what is included — consultation, follow-up visits, medications, and enhancement policies. Our guides to LASIK pricing models and what affects the cost of LASIK explain how to read and compare quotes. A meaningful comparison is always between complete, written quotes — never between advertised starting prices.
Questions to Ask About Procedure Choice
At a consultation, the procedure discussion is your opportunity to understand the recommendation. Useful questions include: Which procedures am I a candidate for, and why is one recommended over the others for my eyes? What do my corneal measurements show? How many of each procedure has the surgeon performed? What is the price difference between the options, and what accounts for it? What does recovery look like for each, in practical terms — time off work, driving, exercise?
A provider who welcomes these questions and answers them specifically — referencing your measurements rather than speaking in generalities — is demonstrating the thoroughness you want. A provider who recommends a single procedure without explaining why the others were ruled out deserves a follow-up question, or a second opinion elsewhere.
Frequently Asked Questions
Is LASIK better than PRK?
Neither is universally better — they are different procedures suited to different eyes and situations. LASIK is generally known for quicker visual recovery and milder early discomfort, while PRK avoids creating a corneal flap, which makes it an option for thinner corneas or certain lifestyles. The "better" procedure is the one your surgeon recommends based on your corneal measurements, prescription, and eye health. A consultation that evaluates you for both and explains the reasoning is more valuable than any general comparison. Our in-depth PRK guide covers the trade-offs in detail.
What is the newest type of laser vision correction?
SMILE (small incision lenticule extraction) is the newest of the three main laser procedures discussed here, using a femtosecond laser to remove a thin lenticule of corneal tissue through a small incision. It is less widely available than LASIK or PRK, and not every prescription or clinic offers it. "Newest" does not automatically mean best for a given eye — suitability still depends on individual measurements and the surgeon's experience with the technique. Ask providers how long they have offered it and which cases they consider it appropriate for.
Can I choose which procedure I get, or does the surgeon decide?
It is a shared decision informed by medical assessment. You can express a preference, but the surgeon determines candidacy for each procedure based on your eye measurements and health — and some eyes are simply not suitable for some procedures. The healthiest dynamic is a consultation where the surgeon explains which options your eyes qualify for, recommends one with specific reasons tied to your measurements, and answers your questions about the alternatives. If you feel steered toward a procedure without explanation, seeking a second opinion is reasonable.
Do all three procedures cost the same?
Not necessarily — pricing varies by clinic and by procedure. Some providers charge the same for LASIK and PRK; others price wavefront-guided LASIK or SMILE higher; PRK is sometimes the lower-cost option. The only reliable way to know is to get itemized written quotes for each procedure you are considering. Be cautious of advertised "starting at" prices, which may reflect only the simplest cases. Our pricing models guide explains how quotes are typically structured and what to compare.
If I'm not a candidate for LASIK, are PRK or SMILE still possible?
Sometimes, yes — candidacy criteria differ between procedures. A person ruled out for LASIK because of corneal thickness, for example, may still be evaluated for PRK, which does not create a flap. Conversely, some eyes suit none of the laser options, in which case non-laser alternatives like ICL or continued use of glasses and contacts may be discussed. Only a qualified eye-care professional who has examined your eyes can answer this for your situation. Our guide to reasons you might not be a LASIK candidate explains common disqualifiers.
This site is educational information only — not medical advice. Consult a qualified eye-care professional about your own situation.
