LASIK vs PRK: Procedure, Recovery, and Results Compared

LASIK vs PRK: Side-by-Side Comparison

Feature	LASIK	PRK
Flap creation	Yes (femtosecond or blade)	No flap; surface ablation
Recovery to functional vision	24–48 hours	1–2 weeks
Full visual stability	1–3 months	3–6 months
Discomfort level	Minimal (1–2 days)	Moderate (3–5 days)
Bandage contact lens	Not required	Required 4–5 days
Dry eye risk	Moderate (nerve disruption)	Lower (less nerve disruption)
Flap dislodgment risk	Small lifelong risk	None (no flap)
Min. corneal thickness	Higher (flap + ablation)	Lower (ablation only)
Corneal haze risk	Minimal	Small (treated with MMC)
Long-term visual outcomes	Equivalent	Equivalent
Enhancement possibility	Flap lift or PRK over flap	PRK re-treatment
Cost	$1,800–$3,500/eye	$1,500–$2,500/eye
Best for	Most candidates; fastest recovery	Thin corneas, athletes, military

Procedure Difference: Flap vs Surface

LASIK creates a corneal flap (using a femtosecond laser or microkeratome), exposes the stromal bed, applies the excimer laser to reshape the stroma, and replaces the flap. The entire active treatment is sub-surface — the eye's surface epithelium is preserved within the flap and heals rapidly. This is why LASIK recovery is so fast.

PRK removes the epithelium entirely, ablates the corneal surface directly (stroma beneath Bowman's layer), and relies on the epithelium regenerating from the wound edges over 3–5 days. This surface healing process is what makes PRK recovery longer and more uncomfortable than LASIK. Learn more about each: LASIK procedure and PRK procedure.

Recovery: The Most Important Practical Difference

For most patients choosing between LASIK and PRK with equivalent candidacy, the dominant factor in the decision is recovery time. LASIK patients drive the day after surgery and return to desk work within 1–2 days. PRK patients typically need 1–2 weeks before their vision is functional enough for driving and office work. For working adults, particularly those who cannot take significant time off, LASIK's rapid recovery is a major advantage.

The tradeoff is the lifelong presence of the LASIK flap. While flaps are stable and rarely problematic, they can theoretically be displaced by severe blunt trauma to the eye — a consideration for contact sport athletes and military personnel who should seriously consider PRK (or SMILE) instead.

Long-Term Visual Outcomes: Equivalent at 12 Months

Multiple systematic reviews and meta-analyses confirm that LASIK and PRK produce statistically equivalent visual outcomes at 12 months and beyond for matched prescriptions. Both achieve 20/20 or better in approximately 93–97% of patients. The surface healing process of PRK does not compromise the final visual quality — once the epithelium has fully stabilized and the refraction is measured at 3–6 months, PRK outcomes parallel LASIK outcomes. See LASIK results statistics.

Dry Eye Risk Comparison

PRK has lower dry eye risk than LASIK because it does not create a stromal flap — the flap creation in LASIK severs more corneal sensory nerve fibers than PRK's surface ablation does. However, both procedures disrupt some corneal nerves, and both can cause post-operative dry eye. PRK's nerve disruption is limited to the superficial nerves in the epithelial zone; LASIK's flap creation additionally severs the deeper stromal nerves. For patients with pre-existing dry eye risk factors, PRK (and SMILE, which has the lowest dry eye impact) is the preferable choice.

Corneal Requirements: PRK Is Accessible for Thinner Corneas

LASIK requires sufficient corneal thickness to create a flap (100–120 microns) plus the ablation depth plus the required residual stromal bed (250+ microns). PRK eliminates the flap thickness requirement — the ablation is performed from the surface, and the full corneal depth is available for the residual stromal bed calculation. This means patients with corneas marginally too thin for LASIK may be excellent PRK candidates. See corneal thickness requirements.

Who Should Choose LASIK vs PRK?

Choose LASIK if: you want the fastest recovery, you work in an environment where 1–2 weeks of blurry vision is not feasible, you have adequate corneal thickness, and your lifestyle does not involve significant eye trauma risk.

Choose PRK if: your corneas are too thin for safe LASIK flap creation, you participate in contact sports (boxing, MMA, martial arts) or high-trauma activities where flap dislodgment is a real risk, you are active military or law enforcement, you have borderline dry eye that contraindicates the additional nerve disruption of LASIK, or you simply prefer to have no permanent flap in your eye.

Also consider SMILE as a third option that offers no-flap surgery with rapid recovery — the best of both worlds for patients within SMILE's prescription range.