Does SMILE Pro Reduce Dry Eye Risks Compared to SMILE?

Why Laser Surgery Causes Dry Eye in the First Place

To understand the difference between the two procedures, you first need to understand the mechanism. Your cornea is one of the most densely nerve-supplied tissues in the entire body. Those nerves do more than register sensation — they drive the reflex that tells your tear glands to produce tears and keep the surface lubricated. When a laser procedure cuts through corneal tissue, it inevitably interrupts some of those nerves. With fewer signals reaching the tear glands, production temporarily drops, and the surface feels gritty, tired, or dry until the nerves recover.

This is why dry eye is essentially a nerve-recovery story rather than a permanent injury for the vast majority of patients. The more nerve tissue a procedure preserves, the less dryness you tend to feel and the faster your comfort returns. If you want the deeper physiology.

Why SMILE Already Has a Lower Dry Eye Profile

Here’s the part many patients miss: SMILE was designed from the start to be kinder to the corneal nerves than LASIK. In LASIK, a large hinged flap is created across most of the cornea, severing a wide arc of nerves at the surface. SMILE takes a completely different route. Instead of a flap, the laser shapes a small lens-shaped piece of tissue — a lenticule — beneath the surface, and the surgeon removes it through a tiny keyhole incision of just a few millimetres.

Because that incision is so small, the dense network of nerves in the upper cornea stays largely intact. Fewer cut nerves means the tear reflex is disturbed far less, and that’s the core reason SMILE patients typically report milder, shorter dryness than LASIK patients. The nerves that are affected regenerate over the following months. SMILE Pro inherits all of this nerve-sparing architecture and then improves on it.

What SMILE Pro Changed — and Why It Matters for Dryness

SMILE Pro isn’t a different operation — it’s a refined version of SMILE running on a faster, smarter laser platform. The upgrades sound technical, but each one ties directly back to less tissue disturbance and a quicker-settling tear film. To understand the procedure itself, our overview of how SMILE Pro eye surgery works is a useful companion to this section.

A Much Faster Laser

The biggest change is speed. The lenticule in SMILE Pro is created in roughly 10 seconds per eye, compared to the longer scan time of the older SMILE laser. A shorter procedure means the corneal surface is exposed and dehydrated for less time on the table, which gives the tear film a head start on the day of surgery itself.

Automatic Centration and Cyclotorsion Correction

SMILE Pro adds automated centring and corrects for the slight rotation of the eye that happens when you lie down (cyclotorsion). In practice, this means the laser places its energy more precisely on the first attempt, with less need for adjustment and less collateral disturbance to surrounding tissue — including the nerve-rich zones that govern tear production.

A Cleaner, More Predictable Lenticule

The newer laser produces a smoother lenticule that separates more cleanly, so removal through the keyhole is gentler. Less mechanical manipulation inside the cornea translates to a calmer healing surface and, for many patients, fewer dry-eye flare-ups in the early weeks. For context on how little tissue is actually involved, see how much cornea is removed in SMILE Pro.

SMILE Pro vs SMILE: The Dry Eye Comparison

When you line the two procedures up side by side, the dry eye advantage of SMILE Pro comes down to small, compounding improvements rather than one dramatic difference:

• Laser time: SMILE Pro is significantly faster per eye, reducing surface exposure during the procedure.
• Centration: Automated in SMILE Pro versus more manual alignment in SMILE, meaning more precise energy placement.
• Tissue disturbance: Generally lower with SMILE Pro, supporting a calmer tear film.
• Early comfort: Many SMILE Pro patients describe dryness as milder and resolving sooner.

It’s important to be honest here: both procedures are excellent for dry eye risk relative to LASIK, and SMILE itself remains a strong choice. SMILE Pro simply moves the needle further in the same direction. The biomechanical reasoning behind this — how the cornea’s strength and stability respond to each technique — is explored in our comparison of SMILE Pro versus SMILE corneal biomechanics.

Who Benefits Most From the Lower Dry Eye Risk

The comfort advantage isn’t equally large for everyone. It’s most noticeable for people whose eyes are already working a little harder to stay lubricated. You’re likely to feel the biggest benefit if you fall into one of these groups:

• Long-time contact lens wearers whose tear film is already slightly compromised from years of lens use.
• Heavy screen users — software professionals, students, gamers, and anyone who blinks less during long focus sessions.
• People in dry or air-conditioned environments, including frequent flyers and those working in climate-controlled offices.
• Patients with borderline tear quality flagged during their pre-surgery workup.

If you’re weighing this procedure against flap-based surgery for exactly these reasons, our direct comparison of SMILE Pro versus LASIK covers how the flapless approach changes the dry eye equation more broadly.

What Dry Eye Recovery Actually Looks Like

Setting expectations matters, because “lower risk” doesn’t mean “zero dryness.” A typical SMILE Pro patient may notice some grittiness or a tired feeling in the first few days to a couple of weeks, which then steadily fades as the corneal nerves begin to recover. Most people are comfortable well before the nerves have fully regenerated, because even partial recovery restores enough of the tear reflex for normal daily life.

Compared with the older SMILE platform, the trajectory tends to be shorter and smoother — and considerably gentler than the dry-eye course many associate with LASIK. If you’d like to see how the timeline differs between the two SMILE generations, our article on why recovery is faster with SMILE Pro than SMILE maps out the practical differences week by week.

Managing Dryness After SMILE Pro

Even with a lower-risk procedure, a few simple habits make the early weeks more comfortable and protect your healing surface:

• Use lubricating drops as advised. Preservative-free artificial tears are the mainstay of early comfort.
• Take screen breaks. Follow the 20-20-20 rule and blink consciously during long computer sessions to keep the surface coated.
• Stay hydrated and manage airflow. Avoid pointing fans or AC vents directly at your face, and keep the room from getting too dry.
• Attend your follow-ups. If dryness lingers, it’s easily managed — but only if your surgeon can see how your surface is healing.

Persistent morning dryness is one of the more common questions we field, and it usually has a simple explanation; our piece on why you wake up with dry eyes after surgery covers what’s normal and what isn’t.