LASIK vs SMILE vs PRK: Which Vision Correction Is Right for You?

Laser vision correction can free you from glasses and contact lenses — but "which laser?" is the wrong first question. The right one is "which procedure suits my eyes?" Candidacy depends on your corneal thickness, prescription, eye surface health and lifestyle. Here's how the three main options compare.

LASIK

LASIK creates a thin hinged flap in the cornea, reshapes the tissue underneath with a laser, then repositions the flap. It's popular because recovery is fast — many people see well the next morning, with little discomfort. It suits a wide range of prescriptions but needs adequate corneal thickness.

SMILE

SMILE is flapless. The laser creates a small lens-shaped piece of tissue (a lenticule) inside the cornea, which is removed through a tiny incision. Because there's no flap, SMILE preserves more corneal strength and is often preferred for higher myopia or for people in contact sports. It's mainly used for short-sightedness.

PRK

PRK is the original surface technique: the laser reshapes the cornea after gently removing the outer cell layer, which then regrows over a few days. There's no flap and no lenticule, making it a good option for thinner corneas or certain professions. The trade-off is a slower, slightly more uncomfortable recovery.

Quick comparison

• Recovery speed: LASIK and SMILE are fast; PRK is slower (several days).
• Corneal strength preserved: SMILE and PRK score well here.
• Range of prescriptions: LASIK is the most versatile; SMILE focuses on myopia.
• Thin corneas: PRK or SMILE may be safer than LASIK.

Who is not a candidate?

Laser correction is usually deferred if your prescription is still changing, if you have very thin or irregular corneas (e.g. keratoconus), significant dry eye, or certain other eye conditions. A detailed refractive workup — including corneal topography — is the only way to know for sure. If you wear contact lenses, you'll be asked to stop them for several days to weeks before this scan so measurements are accurate.

The bottom line

There is no universally "best" procedure — only the best fit for your eyes. A trustworthy refractive surgeon will run the full workup and may recommend the option that's safest for you, even if it isn't the one you walked in asking for. Book a screening, ask why a given procedure is recommended, and don't decide on price alone.