Comparison guide

LASEK vs SMILE: Which Is Better? (2026)

LASEK treats the corneal surface with no flap or incision, so it suits thin corneas but hurts for 2–4 days and vision takes weeks to settle. SMILE removes a lenticule through a 2–4 mm incision, with clear vision in days. In Seoul, LASEK costs ₩1.5M–₩2.5M and SMILE ₩2.2M–₩3.2M for both eyes.
Reviewed November 2026 · Seoul LASIK Clinic Directory
LASEK vs SMILE: Which Is Better? (2026)

LASEK or SMILE: which is better?

Neither is better for everyone. LASEK is the more conservative choice for thin or irregular-surface corneas and costs less; SMILE gives a far more comfortable, faster recovery for moderate myopia and astigmatism.

Both are flap-free, which is why Seoul clinics often offer them to the same people: contact-sport players, military applicants and anyone worried about a LASIK flap. The real differences are how the cornea is treated, how the first week feels and which eyes qualify. Your surgeon decides after measuring your corneal thickness and shape at a full pre-op eye exam.

How do LASEK and SMILE work?

LASEK reshapes the surface of the cornea with an excimer laser; SMILE removes a thin disc of tissue from inside the cornea with a femtosecond laser.

In LASEK, the surgeon applies dilute alcohol (about 18–20%) to loosen the epithelium, the thin outer skin of the cornea, moves it aside, treats the surface with the excimer laser and places a bandage contact lens. The epithelium then regrows over a few days.

In SMILE, a ZEISS VisuMax femtosecond laser cuts a lens-shaped lenticule within the corneal stroma. The surgeon removes it through a small incision of about 2–4 mm. The surface epithelium stays mostly intact, so healing is quick. SMILE Pro is the same operation on the faster VisuMax 800.

LASEK vs SMILE side by side

The table summarises the main practical differences. Ranges are typical, not guarantees.

Factor LASEK SMILE
Laser Excimer laser on the surface Femtosecond laser (ZEISS VisuMax 500 or 800)
Flap or incision None; epithelium moved aside No flap; 2–4 mm incision
Pain Moderate soreness for about 2–4 days Usually mild grittiness for a day
Functional vision About 1 week; final sharpness can take weeks to months Usually within 1–3 days
Bandage contact lens Yes, removed around day 3–4 No
Hyperopia (farsightedness) Can be treated Not standard; SMILE is mainly for myopia and astigmatism
Haze risk Higher, especially in high myopia; mitomycin-C often used Very low
Seoul price, both eyes (2026) ₩1.5M–₩2.5M (≈$1,100–$1,900) ₩2.2M–₩3.2M (≈$1,600–$2,400)
Typical stay in Seoul About 7 days About 3–5 days

Prices were checked in 2026 at roughly ₩1,350–1,400 per US dollar, so dollar figures are approximate. See the SMILE cost guide for what packages include.

Are the long-term results different?

For low to moderate myopia, long-term vision after LASEK and SMILE is broadly similar; the bigger differences are in the first weeks.

Both remove corneal tissue permanently, so neither can be undone, and both can need a top-up if the eye regresses. Enhancement after LASEK is usually another surface treatment. After SMILE, surgeons can re-treat with surface ablation or, on the VisuMax 800, convert the cap into a flap with the CIRCLE option and re-treat as LASIK. Ask each clinic whether a free enhancement is included and for how long; see LASIK enhancement in Korea. Neither stops age-related near-vision loss, which usually appears after 40.

Which hurts more and which recovers faster?

LASEK is clearly the harder recovery. SMILE patients typically return to screens and desk work within a few days, while LASEK patients should plan about a week off.

After LASEK, the eye is sore, watery and light-sensitive until the epithelium closes, and the bandage lens is usually removed on day 3 or 4. AAO EyeWiki lists slow visual rehabilitation, post-operative pain and subepithelial haze as LASEK's main disadvantages, and some series report visual stability only after about two months. SMILE avoids most of this because the surface is left largely intact. For a day-by-day picture, see the SMILE recovery timeline and LASEK recovery and pain guide.

Which is better for thin corneas or dry eyes?

LASEK is usually the safer choice for thin or borderline corneas; SMILE is attractive for people prone to dry eye but still needs enough stromal thickness.

LASEK removes only surface tissue and never creates a cap or flap, so it leaves the deepest untouched stroma. SMILE removes a lenticule from inside the cornea and leaves a cap above it, so it has thickness limits similar to LASIK. Both disturb fewer corneal nerves than a LASIK flap, which is why both are often offered to dry-eye-prone patients. Read more on corneal thickness requirements.

What about higher prescriptions and haze?

For higher myopia, SMILE generally has the edge because surface treatments carry more haze and regression as the treatment gets deeper.

A 2014 meta-analysis of 12 studies found LASEK and LASIK equally safe and effective for low to moderate myopia, but in moderate to high myopia LASEK had more haze and more eyes losing a line of corrected vision. Surgeons reduce this risk with mitomycin-C. SMILE has been FDA-approved for myopia since 2016 and for myopic astigmatism since 2018. Very high prescriptions may be better served by an ICL lens implant.

Who should choose which?

Choose LASEK if you:

  • Have thin, borderline or irregular-surface corneas
  • Are farsighted, or need a surface touch-up after earlier surgery
  • Want the lowest price and can rest for a week

Choose SMILE if you:

  • Have myopia with or without astigmatism and enough corneal thickness
  • Need to be back at work or travelling within a few days
  • Want minimal pain and a low haze risk

These are general patterns, not medical advice. Only an ophthalmologist who has examined your eyes can tell you which is safe for you.

Sources

Key facts

  • LASEK: surface laser after loosening the epithelium with dilute alcohol; no flap, no incision
  • SMILE: ZEISS VisuMax femtosecond laser cuts a lenticule, removed through a 2–4 mm incision
  • Recovery: LASEK bandage lens off around day 3–4; SMILE usually clear within days
  • Seoul price (both eyes): LASEK ₩1.5M–₩2.5M; SMILE ₩2.2M–₩3.2M
  • Thin corneas: LASEK leaves the most stroma untouched
  • Prices: LASEK cost in Korea

Independent directory. Prices are typical ranges reported by Seoul clinics and change often. Always confirm a written quote and get a full eye exam before booking. This page is general information, not medical advice.

FAQ

Frequently asked questions

Is LASEK or SMILE more painful?

LASEK is more painful. Most people have moderate soreness and light sensitivity for 2–4 days until the surface heals, while SMILE usually causes only mild grittiness for about a day.

Is SMILE better than LASEK for thin corneas?

Usually not. LASEK leaves more untouched stroma, so surgeons often prefer it for thin or borderline corneas. SMILE still needs enough thickness for the lenticule and cap.

How much do LASEK and SMILE cost in Korea?

In Seoul, LASEK costs about ₩1.5M–₩2.5M and SMILE about ₩2.2M–₩3.2M for both eyes, based on 2026 checks. Confirm what each quote includes.

Can SMILE correct farsightedness?

SMILE is mainly used for myopia and myopic astigmatism. Farsighted patients are more often offered LASIK or surface treatments such as LASEK.

How long should I stay in Seoul for LASEK vs SMILE?

Plan about 3–5 days for SMILE and about a week for LASEK, so the bandage lens can be removed and the surface checked before you fly.

Planning vision correction in Seoul?

Compare clinics by district, check 2026 price ranges, and read our step-by-step planning guide for international patients.