Laser Vision Correction in Japan: An Overview
Laser refractive surgery has helped millions of people worldwide reduce or eliminate their dependence on glasses and contact lenses. In Japan, two procedures dominate the market: LASIK (Laser-Assisted In Situ Keratomileusis) and the newer SMILE (Small Incision Lenticule Extraction). Both use laser energy to reshape the cornea, but they differ significantly in technique, recovery, and ideal candidacy.
How LASIK Works
LASIK is a two-step procedure that has been performed for decades:
- A thin flap is created on the corneal surface using either a microkeratome blade or a femtosecond laser (bladeless LASIK).
- The flap is lifted, and an excimer laser reshapes the underlying corneal tissue to correct refractive errors.
- The flap is repositioned, acting as a natural bandage while healing occurs.
LASIK is approved and widely available at eye surgery clinics across Japan's major cities. Most patients experience significant vision improvement within 24 hours.
How SMILE Works
SMILE is a more recent, minimally invasive approach:
- A femtosecond laser creates a small lens-shaped piece of tissue (a lenticule) within the cornea — entirely beneath the surface.
- The surgeon removes the lenticule through a small arc-shaped incision (less than 4 mm), changing the cornea's shape.
- No large flap is created, preserving more corneal structural integrity.
SMILE is performed using the ZEISS VisuMax system, available at select specialized clinics in Japan.
LASIK vs. SMILE: Side-by-Side Comparison
| Feature | LASIK | SMILE |
|---|---|---|
| Incision size | Large flap (~20 mm arc) | Small keyhole (~4 mm) |
| Corneal nerves preserved | More disruption | Less disruption |
| Dry eye risk | Moderate | Lower |
| Vision recovery | Very fast (24–48 hrs) | Slightly slower (few days) |
| Suitable for high myopia | Yes | Yes |
| Suitable for hyperopia | Yes | Not yet approved |
| Flap dislocation risk | Small but present | None (no flap) |
| Cost in Japan (approx.) | ¥200,000–¥380,000 | ¥300,000–¥500,000 |
Who Is a Good Candidate?
Not everyone is eligible for laser vision correction. General candidacy requirements include:
- Age 20 or older with a stable prescription for at least 1–2 years
- Sufficient corneal thickness (measured during pre-operative screening)
- No significant keratoconus or corneal disease
- Myopia (nearsightedness) within the treatable range
- No severe dry eye syndrome (pre-existing dry eye may affect suitability)
A thorough pre-operative examination — including corneal topography, pachymetry, and wavefront analysis — is mandatory at reputable clinics in Japan before any procedure is approved.
What to Ask Your Surgeon
- Which procedure is recommended for my specific prescription and corneal profile?
- What laser system does your clinic use, and how many procedures have been performed on it?
- What are the realistic outcomes for someone with my eye measurements?
- What is the enhancement or re-treatment policy if results are unsatisfactory?
Final Considerations
Both LASIK and SMILE are proven, safe procedures when performed by qualified ophthalmologists using calibrated equipment. SMILE's smaller incision and lower dry eye risk make it attractive for active individuals or those with borderline dry eye. LASIK remains more widely available and is suitable for a broader range of refractive errors. Whichever you choose, selecting a board-certified ophthalmologist at a dedicated laser eye surgery center in Japan is the most important decision you can make.