LASIK vs PRK: What's the difference?

LASIK and PRK are both laser vision correction procedures with the same goal but different approaches.

Key Differences

Factor

LASIK

PRK

Flap	Yes, created and replaced	No flap
Surface treatment	Underneath flap	On surface
Recovery	24-48 hours	5-7 days
Discomfort	Minimal	More during healing
Final results	Same	Same
Corneal strength	Less preserved	More preserved

How Each Works

LASIK

1. Thin flap created in cornea 2. Flap lifted 3. Laser reshapes underlying tissue 4. Flap replaced 5. Heals quickly

PRK

1. Surface cells (epithelium) removed 2. Laser reshapes cornea directly 3. Bandage contact lens placed 4. Epithelium regenerates (3-5 days) 5. Vision stabilizes over weeks

When PRK Is Better

• Thin corneas: Preserves more tissue
• Contact sports/military: No flap to dislodge
• Dry eyes: May cause less post-op dryness
• Large pupils: Similar outcomes
• Previous eye surgery: May be safer option

When LASIK Is Better

• Faster recovery needed: Back to work in 1-2 days
• Comfort priority: Less post-op discomfort
• Both eyes same day: PRK sometimes done separately
• Adequate corneal thickness: Flap not a concern

Long-Term Results

Both procedures achieve:

• Same final visual outcomes
• Similar enhancement rates
• Comparable long-term stability

The main difference is getting there: LASIK is faster and more comfortable during recovery.