LASIK and PRK: A Side-by-Side Comparison for Vision Correction

For millions of people worldwide, glasses and contact lenses are a daily reality. But for those seeking a more permanent solution snu eye clinic  to nearsightedness, farsightedness, or astigmatism, laser eye surgery offers an appealing alternative. Two of the most well-known procedures—LASIK and PRK—are both effective, FDA-approved methods of vision correction. While they share similarities, they also have key differences that can influence which option is best for you.

In this article, we’ll compare LASIK and PRK side-by-side, breaking down how each procedure works, their pros and cons, recovery timelines, and who makes a good candidate.

What Are LASIK and PRK?

LASIK (Laser-Assisted In Situ Keratomileusis)

LASIK is currently the most popular form of refractive surgery. It involves creating a thin flap in the cornea using either a microkeratome blade or a femtosecond laser. The surgeon then lifts the flap and uses an excimer laser to reshape the underlying corneal tissue, correcting the refractive error. The flap is then repositioned to heal naturally.

PRK (Photorefractive Keratectomy)

PRK is the original laser eye surgery, predating LASIK. Instead of creating a flap, the surgeon removes the outermost layer of the cornea (the epithelium) entirely. Then, as with LASIK, an excimer laser reshapes the corneal tissue. The epithelium naturally regenerates over several days.

Side-by-Side Comparison

Benefits of LASIK

• Faster visual recovery: Most patients see significant improvement within 24–48 hours.

• Minimal discomfort: Thanks to the flap approach, the healing process is often smoother in the first few days.

• Convenience: Quicker return to daily activities, including work and driving.

• Proven track record: Decades of data show high satisfaction rates—over 95% of LASIK patients achieve 20/40 vision or better.

Benefits of PRK

• No corneal flap: This eliminates the risk of flap-related complications like dislocation, making PRK a better option for people in contact sports or high-risk environments.

• Better for thin corneas: PRK removes less tissue overall, so it’s often the procedure of choice for those with thinner corneas.

• Lower long-term risk: Although initial healing takes longer, PRK may result in fewer long-term complications related to the structural integrity of the cornea.

Drawbacks to Consider

LASIK:

• Flap risks: Though rare, issues like flap dislocation or wrinkling can occur, especially from eye trauma.

• Dry eyes: LASIK is more likely to cause or worsen dry eye symptoms, particularly in the early months.

• Not suitable for everyone: People with thin corneas or irregular corneal surfaces may be ruled out for LASIK.

PRK:

• Longer recovery: Vision may be blurry for several days to a week, and full visual stabilization can take several weeks.

• Post-op discomfort: The first few days after surgery can be painful due to the removal of the epithelium.

• Slower return to activities: Patients typically need more downtime before resuming work, driving, or other daily tasks.

Who Is a Good Candidate?

You might be a good candidate for LASIK if you:

• Have a stable prescription (no significant change for 1+ years)

• Have thick enough corneas

• Are not prone to dry eyes

• Want a quick recovery with minimal downtime

You might be a better fit for PRK if you:

• Have thin or irregular corneas

• Are involved in contact sports or military service

• Have previously had LASIK or other eye surgeries

• Are okay with a longer recovery in exchange for reduced long-term flap risk

Long-Term Results

In the long run, both LASIK and PRK offer similar visual outcomes. Most patients achieve 20/20 vision or better, with low complication rates. The main differences lie in the recovery experience and patient eligibility rather than in the quality of results.

Studies show that five years after surgery, LASIK and PRK patients report comparable satisfaction rates, visual acuity, and lifestyle improvements. For most people, the choice between the two boils down to personal preference and eye anatomy.

Final Thoughts

LASIK and PRK are both excellent vision correction procedures with high success rates and millions of satisfied patients. While LASIK offers faster recovery and less initial discomfort, PRK can be a safer option for those with thin corneas or active lifestyles.

Before making a decision, consult with an experienced ophthalmologist who can evaluate your eyes and discuss which option is right for you. With the right procedure and a trusted surgeon, clear vision without glasses or contacts could be just a laser away.