LASIK vs PRK: Which Eye Surgery is Better?

If you're tired of glasses and contacts, laser vision correction is one of the most life-changing procedures available. But you'll quickly encounter a choice: LASIK or PRK? Both reshape your cornea to correct vision, both have excellent success rates, and both are performed on an outpatient basis in under 30 minutes.

The differences lie in technique, recovery, and which one is safer for your specific eyes. Let's break it all down.

Quick Comparison: LASIK vs PRK

Factor	LASIK	PRK
Procedure	Creates corneal flap, lasers underneath	Removes surface epithelium, lasers directly
Surgery time	~15 min both eyes	~15 min both eyes
Pain during	Minimal (numbing drops)	Minimal (numbing drops)
Pain after	Mild (4-6 hours)	Moderate (3-5 days)
Visual recovery	1-2 days to functional vision	1-2 weeks to functional vision
Full stabilization	1-3 months	3-6 months
20/20 outcome	~96%	~96%
Corneal flap?	Yes	No
Corneal strength	Reduced (flap weakens)	Preserved (no flap)
Cost per eye	$2,000-$3,500	$1,500-$3,000
Enhancement rate	5-10%	5-10%

How LASIK Works

LASIK (Laser-Assisted In Situ Keratomileusis) is a two-step process. First, a femtosecond laser creates a thin, hinged flap in the outer cornea (about 100-160 microns thick). The surgeon lifts this flap, then uses an excimer laser to reshape the underlying corneal tissue—removing microscopic amounts to correct your prescription. The flap is then repositioned, where it adheres naturally without stitches.

LASIK Advantages

• Rapid recovery: Most patients see clearly within 24 hours. Many return to work the next day.
• Minimal discomfort: Post-operative discomfort is mild and typically lasts only 4-6 hours (a gritty, watery-eye sensation).
• Quick visual stabilization: Vision reaches near-final quality within 1-2 weeks, with full stabilization by 1-3 months.
• Proven track record: Over 40 million LASIK procedures performed worldwide since the 1990s with consistently high satisfaction rates (over 96%).
• Easy enhancements: If a touch-up is needed, the original flap can be re-lifted without creating a new incision.

LASIK Risks

• Flap complications (1-5%): Flap wrinkles, displacement, or incomplete creation. Most are correctable.
• Dry eyes (20-40%): Very common in the first 3-6 months. Usually temporary, but can be chronic in 1-5% of cases.
• Halos and glare (10-20%): Especially noticeable at night for the first 3-6 months. Most resolve over time.
• Flap vulnerability: The flap never fully bonds to the underlying tissue, making it vulnerable to displacement from direct eye trauma (rare but possible years later).
• Not for thin corneas: Creating a flap requires sufficient corneal thickness. Thin corneas increase risk of ectasia (progressive corneal weakening).

How PRK Works

PRK (Photorefractive Keratectomy) was actually the first laser vision correction procedure, predating LASIK. Instead of creating a flap, the surgeon removes the cornea's thin outer layer (epithelium) entirely—either with a dilute alcohol solution, a brush, or a laser. The excimer laser then reshapes the exposed cornea directly. A bandage contact lens is placed on the eye to protect it while the epithelium regenerates over 3-5 days.

PRK Advantages

• No flap = no flap complications: The single biggest advantage. No risk of flap displacement, wrinkles, or epithelial ingrowth.
• Preserved corneal integrity: Without a flap, the cornea retains more structural strength—important for long-term eye health.
• Better for thin corneas: PRK can treat patients whose corneas are too thin for safe LASIK flap creation.
• Better for active lifestyles: Military personnel, martial artists, boxers, and other contact-sport athletes prefer PRK because there's no flap that can dislodge from impact.
• Same final results: Long-term visual outcomes are identical to LASIK—the same percentage achieve 20/20 or better.

PRK Risks and Downsides

• Longer, more uncomfortable recovery: The first 3-5 days involve moderate pain, light sensitivity, and tearing as the epithelium regrows. Pain management includes prescription drops and oral medications.
• Slower visual recovery: Functional vision takes 1-2 weeks; complete stabilization can take 3-6 months.
• Corneal haze risk: A small risk (1-3%) of developing corneal haze (scarring), especially with higher prescriptions. Mitomycin C drops during surgery significantly reduce this risk.
• More follow-up visits: PRK requires more frequent post-operative monitoring during the healing period.
• Dry eyes: Similar rates to LASIK but may resolve slightly faster since no corneal nerves are severed by a flap cut.

Recovery: The Biggest Difference

Recovery is where LASIK and PRK diverge most dramatically. While the surgeries themselves are similarly quick and painless, what follows is very different.

Timeline	LASIK	PRK
Day 1	Blurry but improving; mild discomfort	Very blurry; moderate pain begins
Day 2-3	Most can drive and work	Peak discomfort; light sensitivity
Day 5-7	Vision stabilizing nicely	Bandage lens removed; vision still hazy
Week 2	Near-final vision quality	Functional vision for most activities
Month 1	Fully stabilized for most	Good vision; still fluctuating slightly
Month 3-6	Final result	Final result

Who Is a Candidate for Each?

LASIK Candidacy Requirements

• Age 18+ (ideally 21+ for prescription stability)
• Stable prescription for at least 1-2 years
• Sufficient corneal thickness (typically 500+ microns)
• No corneal irregularities (keratoconus rules out LASIK)
• Nearsightedness up to about -12.00 diopters
• Farsightedness up to about +6.00 diopters
• Astigmatism up to about 6.00 diopters
• No uncontrolled autoimmune diseases
• Not pregnant or nursing

PRK May Be Recommended Instead If:

• Your corneas are too thin for a LASIK flap
• You have a physically active lifestyle with risk of eye impact
• You're in the military (military branches often prefer or require PRK)
• You have mild corneal surface irregularities
• You previously had LASIK and need an enhancement but can't re-lift the flap
• You have large pupils (PRK may produce fewer nighttime halos in some cases)

Cost Breakdown

Cost Component	LASIK	PRK
Surgery per eye	$2,000-$3,500	$1,500-$3,000
Total (both eyes)	$4,000-$7,000	$3,000-$6,000
Pre-op consultation	$100-$200 (often waived)	$100-$200 (often waived)
Post-op drops	$50-$150	$75-$200
Follow-up visits	Usually included	Usually included (more visits)
Enhancement (if needed)	Often free within 1-2 years	Often free within 1-2 years

How to Choose: Decision Guide

Choose LASIK If:

• Your corneas are thick enough (your surgeon will measure)
• You want the fastest possible recovery
• You can't take extended time off work
• You don't participate in contact sports
• You want minimal post-operative discomfort

Choose PRK If:

• Your corneas are on the thinner side
• You're in the military or active-duty
• You participate in martial arts, boxing, or contact sports
• You're concerned about flap-related risks
• You can tolerate a longer recovery period
• Your surgeon recommends it based on your eye anatomy

The Bottom Line

For most people with adequate corneal thickness and a standard lifestyle, LASIK is the preferred choice due to faster recovery and less discomfort. But if your surgeon recommends PRK, don't be discouraged—you'll achieve the same excellent vision; it just takes a bit longer to get there. The few weeks of patience are a small price for decades of clear vision.