Choosing between SMILE Pro and TransPRK? Both are flapless laser eye surgeries — meaning neither creates the corneal flap associated with traditional LASIK — but that’s where the similarities end. They use different lasers, work on different layers of the cornea, recover at different speeds, and suit different types of patients. This guide puts them side by side so you can walk into your consultation with clarity.
At Visual Aids Centre in Delhi, we perform both procedures under one roof, which means the recommendation you receive is based purely on your corneal anatomy and prescription — not on which machine happens to be available. Below, we break down every parameter that matters: technique, comfort, recovery, candidacy, cost, and long-term outcomes.
Key Takeaways
- SMILE Pro extracts a lenticule through a 2 mm keyhole incision; TransPRK is entirely contactless — no incision and no touch.
- TransPRK treats a wider range of refractive errors, including hyperopia and presbyopia, while SMILE Pro is limited to myopia and astigmatism.
- SMILE Pro offers same-day visual improvement and minimal pain; TransPRK involves 1–2 days of discomfort and a longer visual stabilisation period.
- TransPRK suits thinner corneas (≥485 microns), making it the go-to option when SMILE Pro’s 550-micron threshold excludes a patient.
SMILE Pro vs TransPRK — At a Glance
Here’s a quick-reference comparison covering the parameters patients ask about most. The detailed sections below explain the clinical reasoning behind each difference.
| Parameter | SMILE Pro | TransPRK |
|---|---|---|
| Laser Platform | Zeiss VisuMax 800 (femtosecond) | Schwind Amaris (excimer) |
| Procedure Type | Lenticule extraction | Advanced Surface Ablation (ASA) |
| Incision | 2–4 mm micro-incision | ❌ None — fully contactless |
| Corneal Flap? | ❌ No | ❌ No |
| Laser Time per Eye | ~10 seconds | ~3–5 minutes |
| Myopia Correction | Up to –10 D | Up to –10 D |
| Astigmatism Correction | Up to –5 D | Up to –5 D |
| Hyperopia Correction | ❌ Limited | ✅ Up to +4 D |
| Presbyopia | ❌ No | ✅ Yes |
| Min. Corneal Thickness | 550 microns | 485 microns |
| Pain / Discomfort | Minimal — little to no pain | Moderate — 1–2 days discomfort |
| Visual Recovery | Same-day improvement | 1 week surface healing; 2–3 months full clarity |
| Return to Work | Next day for most | 4–7 days typically |
| Infection Risk | Low | Slightly higher (surface procedure) |
| Dry Eye Risk | Low — preserves more nerves | Moderate — may persist longer |
| CXL Recommended? | Not typically | Yes, for thin corneas / high powers |
| Cost (Both Eyes) | ~₹1,50,000 | ~₹75,000 |
| Ideal For | Standard myopia & astigmatism, athletes, fast recovery | Thin corneas, hyperopia, budget-conscious patients |
💡 Quick verdict: SMILE Pro wins on speed, comfort, and recovery. TransPRK wins on candidacy range, hyperopia correction, and affordability. The right choice depends on your cornea and prescription — discuss both during a free consultation at Visual Aids Centre.
How SMILE Pro Works
SMILE Pro (Small Incision Lenticule Extraction) uses the Zeiss VisuMax 800 femtosecond laser to create a thin, disc-shaped piece of tissue — called a lenticule — inside the intact cornea. The surgeon then removes that lenticule through a tiny 2–4 mm keyhole incision, reshaping the cornea from within. The entire laser phase takes roughly 10 seconds per eye, making it one of the fastest refractive procedures available.
Because no flap is created and the outer corneal surface stays largely intact, SMILE Pro preserves a greater number of corneal nerves than flap-based surgeries. This translates into fewer dry-eye symptoms during recovery and a structurally stronger cornea post-surgery — an advantage that matters especially for athletes and patients in contact sports. For a deeper look at the technology, our page on how SMILE Pro works covers the mechanics in detail.
How TransPRK Works
TransPRK (Transepithelial Photorefractive Keratectomy) takes a fundamentally different approach. It is an Advanced Surface Ablation procedure that uses the Schwind Amaris excimer laser to vaporise the outermost epithelial layer of the cornea and then precisely sculpt the underlying stromal tissue — all in a single, contactless step. No blade, no incision, and no manual epithelium removal. After surgery, a bandage contact lens is placed on the eye for four to five days while the epithelium regenerates naturally.
The procedure typically takes three to five minutes per eye — longer than SMILE Pro — but its real strength is versatility. TransPRK can correct myopia, astigmatism, hyperopia, and even presbyopia, making it an option for patients whose prescriptions fall outside SMILE Pro’s range. It also works on corneas as thin as 485 microns, well below SMILE Pro’s 550-micron minimum. To understand how it compares to traditional LASIK as well, our guide on TransPRK vs LASIK vs SMILE provides a three-way comparison.
Key Differences That Matter
Surgical Approach
This is the most fundamental distinction. SMILE Pro works inside the cornea — the laser creates a lenticule beneath the surface, which is extracted through a small peripheral incision. The epithelium is never removed. TransPRK works on the surface — the laser ablates the epithelium first and then reshapes the stroma directly. The result is that SMILE Pro leaves the corneal surface almost entirely undisturbed, while TransPRK requires the epithelium to regenerate from scratch over four to seven days.
Pain and Comfort
Patients consistently report that SMILE Pro is more comfortable. Most describe only mild pressure during the procedure and little to no pain afterward. TransPRK, on the other hand, involves moderate discomfort for the first one to two days as the epithelium heals — patients often describe it as a gritty or burning sensation. The pain is manageable with prescribed drops and oral medication, but it’s a real consideration if downtime matters to you. Our article on whether SMILE Pro is painful gives a candid patient-perspective breakdown.
Recovery Timeline
SMILE Pro patients typically notice significantly clearer vision within hours. Most return to work the next day, and full visual stabilisation occurs within a few weeks. TransPRK has a longer recovery arc: the bandage contact lens stays on for four to five days, functional vision returns within about a week, but full clarity — especially contrast sensitivity and depth perception — can take two to three months to stabilise. For patients exploring TransPRK recovery in detail, we have a dedicated guide.
Candidacy and Treatment Range
This is where TransPRK shines. It corrects hyperopia up to +4 dioptres and presbyopia — conditions that SMILE Pro currently cannot treat. It also accommodates thinner corneas, starting at 485 microns versus SMILE Pro’s 550-micron threshold. If your cornea is too thin for SMILE Pro, or if you have farsightedness, TransPRK may be your best flapless option. Patients who don’t qualify for either procedure might consider implantable collamer lenses (ICL) as an alternative.
Cost
TransPRK is significantly more affordable — approximately ₹75,000 for both eyes at Visual Aids Centre, compared to around ₹1,50,000 for SMILE Pro. The price difference reflects the newer VisuMax 800 platform and the faster, more comfortable experience that SMILE Pro delivers. Both procedures yield excellent long-term visual outcomes, so cost alone shouldn’t drive the decision — but it’s a practical factor for many patients. For a broader pricing overview, visit our page on SMILE Pro surgery cost.
Infection and Dry Eye Risk
TransPRK, like all surface ablation procedures, carries a slightly higher risk of infection than SMILE Pro because the epithelium is completely removed and needs time to regrow. Dry eye symptoms may also persist longer with TransPRK. SMILE Pro’s small incision preserves more corneal nerves, which is why dry eye risk with SMILE Pro tends to be lower. That said, when TransPRK is combined with corneal cross-linking for thin or at-risk corneas, it adds an extra layer of structural safety.
Who Should Choose Which?
Choose SMILE Pro if: you have myopia or myopic astigmatism within the treatment range, your cornea is thick enough (≥550 microns), you want the fastest possible recovery with minimal discomfort, or your lifestyle demands minimal downtime — think athletes, busy professionals, and content creators.
Choose TransPRK if: you have hyperopia, presbyopia, or a mixed prescription that SMILE Pro cannot address, your cornea is thinner than 550 microns, you’re comfortable with a longer recovery window, or budget is a primary consideration. TransPRK is also the preferred surface procedure when a fully contactless, no-touch approach is important to you — nothing physically touches the eye during surgery.
Conclusion
SMILE Pro and TransPRK are both excellent flapless vision correction procedures — but they serve different patient profiles. SMILE Pro offers unmatched speed, comfort, and next-day recovery for myopia and astigmatism. TransPRK provides broader treatment coverage, works on thinner corneas, corrects farsightedness, and comes at a lower price point. The “better” procedure is the one that matches your prescription, your corneal anatomy, and your recovery expectations. To find out which surgery suits your eyes, book a consultation at Visual Aids Centre and our team will map out your personalised treatment plan.
Frequently Asked Questions (FAQs)
Is TransPRK more painful than SMILE Pro?
Yes, TransPRK involves moderate discomfort (gritty, burning sensation) for 1–2 days while the epithelium regenerates. SMILE Pro patients typically report minimal to no pain during and after the procedure.
Can TransPRK correct farsightedness?
Yes. TransPRK treats hyperopia up to +4 dioptres and can also address presbyopia — conditions that SMILE Pro currently cannot correct.
Which procedure is better for thin corneas?
TransPRK. It requires a minimum corneal thickness of only 485 microns, compared to SMILE Pro’s 550-micron requirement. For very thin corneas, TransPRK may also be combined with corneal cross-linking (CXL) for added structural safety.
How long does recovery take for each procedure?
SMILE Pro: same-day visual improvement, most patients return to work the next day. TransPRK: surface healing takes about a week, full visual clarity stabilises over 2–3 months.
Why is SMILE Pro more expensive than TransPRK?
SMILE Pro uses the newer Zeiss VisuMax 800 femtosecond laser platform, which offers faster treatment (10 seconds per eye), greater comfort, and quicker recovery. The advanced technology accounts for the price difference.
