SMILE Pro vs Femto LASIK: How the Two Compare

“Femto LASIK” is the name used for LASIK where both steps are laser-based: a femtosecond laser makes the flap and an excimer laser performs the correction. It is the version of LASIK most Dubai clinics offer today, and it is the version most often placed next to SMILE Pro in a comparison.

The two procedures share a word and a technology, which is where the confusion starts.

Where do they overlap?

Both begin with a femtosecond laser, and both correct short-sightedness and astigmatism by changing the shape of the cornea. Both are performed as day procedures under topical anaesthetic, and both usually treat both eyes in the same session.

They also share the same categories of outcome risk: dry eye, glare and halos, fluctuation, under- and over-correction, and the possibility of an enhancement.

Where do they differ?

What the femtosecond laser does. In femto LASIK it creates a flap. In SMILE Pro it creates a lenticule and a small incision.

Whether an excimer laser is used. Femto LASIK uses one. SMILE Pro does not.

Whether the surface is opened. Femto LASIK folds back a flap, exposing the corneal bed. SMILE Pro leaves the surface intact except for the incision.

Whether the correction can be adjusted mid-procedure. With a flap lifted and an excimer laser at work, the surgeon can refine the ablation as the procedure proceeds. SMILE’s correction is defined by the lenticule the femtosecond laser has already cut, so there is less scope for intraoperative adjustment. This is a real trade-off, and it is worth asking a surgeon how they handle it.

How a retreatment is performed. With femto LASIK, a retreatment can often be done by lifting the original flap. After SMILE, there is no flap to lift, so an enhancement usually means a surface procedure such as PRK on top of the existing correction. That changes the recovery of the enhancement, and it is a question to ask before the first procedure rather than after the second.

Which has the better dry-eye profile?

This is the comparison most often made in marketing material, and it deserves more care than it usually gets.

SMILE avoids creating a flap, and the incisions involved are smaller. The surface nerves of the cornea run through the tissue that a flap interrupts, so a technique that avoids interrupting them is plausibly gentler on corneal sensation in the early post-operative period. Some comparative studies have reported findings consistent with that; others find the gap narrows with time.

A plausible mechanism plus mixed literature is not a guarantee. Anyone with pre-existing dry eye should have it assessed and, where necessary, treated before either procedure, and should be prepared for the possibility that the answer is neither.

Does prescription affect the choice?

It can. The treatable ranges for the two techniques are not identical, and they change as platforms and experience develop. Corneal thickness interacts with both: femto LASIK typically removes tissue as well, and the arithmetic differs between techniques.

Hyperopic correction is a clearer dividing line. LASIK has a longer history of treating long-sightedness than SMILE does, and SMILE is not offered for hyperopia in every market.

Does surgeon experience matter differently?

The flap in femto LASIK is a well-established step with a great deal of accumulated experience behind it across the field. The lenticule separation in SMILE is a different manual skill, and the published literature has documented a learning curve associated with it.

The practical consequence is that asking how many of each procedure a clinic performs per month is a reasonable question, and worth asking even though it feels rude. Volume is a proxy for consistency.

What this means for you

If both procedures are suitable for your measurements, the decision usually comes down to how you weigh three things: the desire to avoid a flap against the ability to adjust intraoperatively, the recovery profile you are willing to accept, and how a future enhancement would be handled.

None of those has a universally right answer, and a clinic that presents one procedure as obviously superior for everyone has told you something about its sales process.

Our comparison page sets SMILE Pro, LASIK and PRK side by side across twelve categories with a tool for expanding the ones that matter to you.