Physician review pending - the published version will carry a named surgeon byline.
If you have researched vision correction recently, you have probably seen "SMILE Pro" mentioned alongside SMILE and LASIK, sometimes with a nine-second figure attached and not much explanation. This guide unpacks what the procedure actually is, what the VISUMAX 800 changed compared with the previous generation, and why a shorter laser pass is more than a marketing number. Everything here comes from the device maker's published materials, peer-reviewed literature, and GS Eye Center's own published records.
What is SMILE, and where does SMILE Pro come from?
SMILE stands for small incision lenticule extraction. Introduced by ZEISS in 2006, it corrects nearsightedness and astigmatism by using a femtosecond laser to form a thin, lens-shaped layer of tissue - a lenticule - inside the intact cornea, which the surgeon then removes through an incision of about 2 mm. There is no corneal flap, which is the structural difference between SMILE and LASIK. The original SMILE received U.S. FDA approval in 2018, and by 2024 the technique had passed ten million procedures worldwide, a milestone ZEISS marked with contribution plaques to high-volume centers, GS Eye Center among them.
SMILE Pro is the 2023-generation evolution of that procedure. It is not a different operation - the lenticule principle and the small incision are the same. What changed is the machine that performs the laser work: the ZEISS VISUMAX 800, successor to the VISUMAX 500 that carried SMILE through its first decade and a half.
What did the VISUMAX 800 change?
Three things, per ZEISS's published specifications and the clinical literature around the platform.
- Speed. The femtosecond laser pulses at a much higher repetition rate than its predecessor, and the scanning system keeps up with it. The result is lenticule creation in under ten seconds per eye, versus roughly thirty seconds on the VISUMAX 500. GS Eye Center's clinical materials describe the pass as about nine seconds, around 2.7 times faster than the previous generation.
- Automated centering (CentraLign). The system displays the patient's visual axis - the line from the fixation target to the center of the retina, measured at the preoperative exam - in real time, so the surgeon docks and centers the treatment on that axis rather than estimating it.
- Automated astigmatism alignment (OcuLign). On earlier SMILE, the astigmatism axis was aligned manually. The VISUMAX 800 shows the measured axis in real time and guides rotational alignment before the laser fires, reducing axis error for astigmatic corrections.
| Factor | SMILE (VISUMAX 500) | SMILE Pro (VISUMAX 800) |
|---|---|---|
| Laser pass per eye | About 30 seconds | Under 10 seconds (about 9, per clinic materials) |
| Centering | Surgeon-guided | CentraLign visual-axis navigation, shown in real time |
| Astigmatism axis | Aligned manually | OcuLign real-time axis guidance |
| Incision | About 2 mm, no flap | About 2 mm, no flap |
| U.S. FDA status | SMILE approved 2018 | Approved with SMILE pro software, January 2024 |
| At GS Eye Center | Two VISUMAX 500 units (since 2016, dual system 2019) | VISUMAX 800 in a dedicated operating room (since 2023) |
Why does a nine-second laser actually matter?
During the laser pass, the eye is held steady by gentle suction on the cornea. If that contact is broken mid-pass - by a sudden eye movement, a squeeze of the lids, or a flinch - the event is called suction loss, and the surgeon has to manage it, usually by re-docking or converting the plan. It is manageable and uncommon, but it is the moment in a SMILE procedure where patient movement matters most.
This is where the numbers become meaningful rather than promotional. A 2021 study in the Journal of Cataract & Refractive Surgery (Wan et al.) analyzed suction loss during SMILE on the VISUMAX 500 across 44,465 eyes: it occurred in 200 eyes, about 0.45 percent, and 130 of those 200 events happened after the ten-second mark of the laser pass. A pass that finishes inside ten seconds is simply over before the window in which most suction-loss events were recorded.
The same logic applies to the patient experience. Holding fixation on a target light for nine seconds is a very different task from holding it for thirty. Shorter laser time also means less time under suction overall, which the clinic's materials connect to reduced strain during surgery. None of this makes the procedure risk-free - no honest clinic will tell you that - but it is a concrete engineering reason, backed by published data, why the industry moved toward faster lenticule creation.
Is SMILE Pro approved in the United States?
Yes. The U.S. FDA approved the VISUMAX 800 with the SMILE pro software in January 2024, per ZEISS's press release and coverage in the ophthalmology trade press, including Healio. American clinics have been installing the platform since then, so "you cannot get this in the U.S." is not true, and you should be skeptical of any site that claims otherwise.
What is true is a difference in timing. Korea and other markets adopted the VISUMAX 800 from 2023, so surgeons here began accumulating SMILE Pro cases earlier - on top of the much longer SMILE history that began in 2016 at this clinic. When patients compare countries, the accurate framing is not access to the machine but the depth of accumulated experience operating it.
How does GS Eye Center use the platform?
GS Eye Center performed its first SMILE Pro procedure in August 2023, the year it installed the VISUMAX 800 and built a dedicated SMILE Pro operating room. The same year, ZEISS designated the clinic a SMILE pro CENTER; it had been certified into the ZEISS SMILE GOLD CLUB in 2021 (per ZEISS certification). By the clinic's published counts, SMILE Pro cases reached 5,000 eyes in October 2024, 10,000 in August 2025, and 15,000 as of April 2026, within a cumulative total of more than 300,000 eyes treated across vision correction and cataract surgery since 2005.
Two details of the setup are worth knowing as a patient. First, the clinic runs the full SMILE family side by side - SMILE Pro on the VISUMAX 800, SMILE LASIK on two VISUMAX 500 units, and the related SILK procedure on the Johnson & Johnson ELITA - so the recommendation can follow the exam rather than the one machine in the building. Second, the clinic's 2022 in-house survey of its SMILE patients found more than half reporting that they did not notice dry eye after surgery, a result the clinic attributes to the small incision limiting corneal nerve disruption. Treat that as one clinic's published figure, not a universal promise; dry eye remains a real, usually temporary, effect of refractive surgery.
Who is SMILE Pro for - and who is it not for?
SMILE Pro corrects nearsightedness and astigmatism, including higher degrees in suitable eyes per the clinic's materials. It does not treat farsightedness, which remains LASIK territory. And like every corneal procedure, it depends on what the examination finds: sufficient corneal thickness, a stable prescription, a healthy tear film, and no signs of conditions such as keratoconus. Patients ruled out of laser surgery are often candidates for a phakic lens instead.
That is why the honest answer to "should I get SMILE Pro?" is always the same: it is decided by around 50 diagnostic tests, not by an article. If you are considering it from the U.S. or Canada, send your prescription through the consultation form and the coordination team will tell you whether the trip is worth planning - before you book anything.
Related pages: SMILE Pro at GS · Why GS for SMILE · SMILE vs LASIK vs ICL