PRK Surgery: Procedure, Recovery, Cost, and How It Compares to LASIK

PRK vs LASIK: The Fundamental Difference

PRK (Photorefractive Keratectomy) was FDA-approved before LASIK (1995 vs 1999) and remains an excellent, widely used refractive procedure. The fundamental difference from LASIK is that PRK does not create a corneal flap. Instead, the epithelium (outer cell layer) is removed — typically by brushing it away with a sterile instrument or applying a dilute alcohol solution — and the excimer laser ablates the corneal surface directly (the stroma beneath Bowman's layer). There is no flap to displace, fold, or suffer complications.

The tradeoff for this flap-free approach is recovery: the epithelium must regrow over the treated surface over 3–5 days, during which vision is blurry and the eye is moderately uncomfortable. Full visual stability takes 1–3 months rather than the days typical of LASIK.

PRK Procedure Steps

1. Anesthetic eye drops are instilled; the eye is prepared and a speculum holds the lids open
2. The epithelium is removed over the treatment zone (approximately 9 mm diameter) using a dulled blade (manual PRK/LASEK), dilute alcohol (alcohol-assisted epithelial removal), or laser (transepithelial PRK/TransPRK)
3. The excimer laser treats the exposed corneal surface with the programmed ablation profile — identical to the LASIK stromal treatment
4. Mitomycin C (MMC), a dilute chemotherapy agent, is applied for 15–30 seconds to reduce post-operative haze risk (standard practice for corrections above -3 D)
5. A bandage contact lens is placed over the treated surface to protect it and reduce pain while the epithelium regenerates

PRK Recovery: What to Expect Week by Week

Timeframe	Typical Experience	Activities
Days 1–3	Significant discomfort, light sensitivity, blurry vision	Rest at home; bandage lens in place
Days 3–5	Epithelium closes; bandage lens removed; discomfort decreases	Light activity; not driving yet
Week 1–2	Vision improving but not crisp; halos possible	Return to desk work Week 2
Month 1	Functional vision for most tasks; continued improvement	Most activities resume
Months 1–3	Progressive visual improvement; haze risk period	All activities including sports
Month 3–6	Prescription stabilizes; final result emerges	Full activity; vision exam

Who Should Choose PRK Instead of LASIK?

PRK is specifically advantageous for:

• Thin corneas: since no flap is created, PRK does not consume flap thickness, allowing treatment of corneas too thin for LASIK
• Contact sports athletes (boxing, MMA, martial arts, football without face protection): no permanent flap means no flap dislodgment risk from blunt trauma
• Military personnel: most U.S. military branches prefer PRK over LASIK for combat roles; the Air Force, Navy SEALs, and Army Special Forces specifically require or prefer PRK/LASEK
• Patients with borderline dry eye: PRK has less corneal nerve disruption than LASIK, though more than SMILE
• Patients with flat corneas or irregular topography: no flap suction concerns with flat corneas
• Patients who had previous LASIK: PRK enhancement over a LASIK flap is often preferable to lifting an old flap

Long-Term Outcomes: PRK vs LASIK at 12 Months

At 12 months and beyond, PRK and LASIK outcomes are statistically equivalent. Both achieve 20/20 or better in approximately 93–97% of patients with comparable prescriptions. PRK does not produce better or worse long-term optical quality, contrast sensitivity, or higher-order aberrations compared to LASIK when matched for prescription and technique. The differences are entirely in the recovery experience — not the final result.

PRK Cost

PRK typically costs approximately $1,500 to $2,500 per eye — generally 10–20% less than comparable LASIK at the same center, reflecting the absence of femtosecond laser cost. However, pricing varies widely by center, location, and what is included. Some centers price PRK and LASIK identically. See LASIK and PRK cost guide.

PRK vs LASIK: Complete Comparison

Feature	PRK	LASIK
Flap creation	No flap	Yes (femtosecond or blade)
Recovery to functional vision	1–2 weeks	24–48 hours
Full visual stability	3–6 months	1–3 months
Discomfort	Moderate 3–5 days	Minimal 1–2 days
Dry eye risk	Lower than LASIK	Higher (nerve disruption)
Flap dislodgment risk	None	Small, lifelong
Thin cornea candidacy	Better	More tissue consumed
12-month visual outcomes	Equivalent	Equivalent
Cost	Slightly lower	Slightly higher (femtosecond)

See also: full LASIK vs PRK comparison and SMILE as another flap-free alternative.