PRK is a flap-free laser procedure that reshapes the corneal surface to correct myopia, hyperopia and astigmatism. It avoids creating a corneal flap — useful for thinner corneas and certain lifestyles — but recovery is slower and initially more uncomfortable than LASIK, with comparable long-term visual results.
How PRK differs from LASIK
\nBoth PRK and LASIK use the same excimer laser to reshape the cornea. The difference is where the laser is applied: in LASIK, a flap is created and the laser treats the corneal bed beneath it; in PRK, the thin surface layer (epithelium) is gently removed, the laser treats the surface directly, and the epithelium grows back naturally over several days. No flap is ever created.
\nWhy PRK may be considered
\n- \n
- Thinner corneas — preserving the flap's tissue keeps more of the cornea untouched. \n
- Contact sports and certain occupations — with no flap, there is no flap to displace later. \n
- Certain corneal surface findings — where a surface approach is technically preferable. \n
- Eyes unsuitable for LASIK but suitable for surface laser after full evaluation. \n
The procedure and recovery
\nThe laser application itself takes well under a minute per eye. A protective "bandage" contact lens is placed while the epithelium heals — typically 3–5 days — during which discomfort, tearing and light sensitivity are normal and managed with medication. Vision then clears gradually: functional in about a week, sharpening over weeks, with final stability over one to three months. This slower recovery is the main trade-off versus LASIK.
\nPRK vs LASIK at a glance
\n| PRK | LASIK | |
|---|---|---|
| Flap | None | Created and repositioned |
| Early comfort | Discomfort for a few days | Mild; settles within hours |
| Visual recovery | Gradual over weeks | Usually within 24 hours |
| Long-term vision | Comparable | Comparable |
| Often chosen for | Thinner corneas, contact sports | Suitable corneas wanting fast recovery |
Suitability and limitations
\nThe same eligibility framework applies — stable prescription, regular topography/tomography, adequate thickness, treated dry eye. PRK-specific considerations include a higher tendency to temporary surface haze (mitigated by medication in higher corrections) and the longer drop regimen. As with any refractive surgery, results vary and no outcome can be guaranteed.
Information on this page is for general education and does not replace an examination, diagnosis or personalised medical advice from a qualified eye-care professional.
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