What Both Procedures Have in Common
LASIK (Laser-Assisted In Situ Keratomileusis) and PRK (Photorefractive Keratectomy) are both laser refractive surgeries that permanently reshape the cornea to correct nearsightedness, farsightedness, and astigmatism. Both use the same type of excimer laser to remove corneal tissue, and both have decades of proven results. The key differences lie in how the surgeon accesses the treatment area and what that means for your recovery.
How LASIK Works
In LASIK, the surgeon creates a thin flap in the outer cornea using either a microkeratome blade or a femtosecond laser. This flap is folded back, the laser reshapes the underlying corneal tissue, and the flap is repositioned — where it adheres naturally without stitches.
Key characteristics:
- Visual recovery is fast — most patients see clearly within 24 hours
- Discomfort is minimal, typically lasting only a few hours post-surgery
- The corneal flap remains a permanent structural change
- Requires a minimum corneal thickness to safely create the flap
How PRK Works
In PRK, the surgeon removes the entire outer epithelial cell layer of the cornea (rather than creating a flap), applies the laser to reshape the cornea, and then allows the epithelium to regenerate over several days.
Key characteristics:
- Recovery takes longer — clear vision typically stabilizes over 1–4 weeks
- More discomfort during the first few days while the epithelium heals
- No permanent flap — the corneal structure is preserved more fully
- Better suited for patients with thin corneas or active lifestyles involving contact sports
LASIK vs. PRK: A Direct Comparison
| Feature | LASIK | PRK |
|---|---|---|
| Recovery time | 24–48 hours | 1–4 weeks |
| Discomfort level | Minimal | Moderate (first few days) |
| Long-term results | Excellent | Excellent |
| Corneal flap | Yes (permanent) | No |
| Thin cornea candidacy | May not qualify | Often suitable |
| Contact sport safety | Flap risk with trauma | No flap risk |
| Dry eye risk post-op | Higher (temporary) | Lower |
Who Is a Good Candidate for Each?
LASIK may be right for you if:
- Your corneas are thick enough to accommodate a flap safely
- You want fast visual recovery for work or daily life
- You don't participate in high-contact sports or physical occupations
PRK may be right for you if:
- Your corneas are thinner or have irregular curvature
- You've been told you're not a LASIK candidate
- You're a military member, contact sport athlete, or martial artist
- You've had previous corneal procedures
What to Expect at a Consultation
A refractive surgery consultation typically includes corneal mapping (topography), pupil dilation, tear film assessment, and a detailed measurement of your prescription and corneal thickness. The surgeon will recommend the procedure best suited to your anatomy — not every patient qualifies for LASIK, and that's not a failure. PRK delivers the same quality of final vision.
The Bottom Line
Both LASIK and PRK are safe, well-established procedures with high patient satisfaction. The right choice is highly individual. Consult with a board-certified ophthalmologist who performs both procedures to get an unbiased recommendation based on your specific corneal anatomy and lifestyle needs.