- Medically Reviewed by: Mr Mfazo Hove, Consultant Ophthalmic Surgeon
- Author: Mr Mfazo Hove
- Published: October 6, 2024
- Last Updated: July 2, 2026
LASIK and SMILE are both excellent corneal laser procedures, and for many patients either would work very well. Neither is universally better; the right choice depends on your prescription, your corneal thickness, your tear film and your lifestyle. The meaningful differences lie in how the cornea is accessed and in the early recovery, particularly around dry eye. This article explains the distinction in plain terms so you can decide with your surgeon.
The Core Difference Between LASIK and SMILE: Flap Versus Flapless
LASIK creates a thin corneal flap with a femtosecond laser, lifts it, reshapes the cornea beneath with an excimer laser, and then repositions the flap, which heals without stitches.
SMILE is flapless: a femtosecond laser shapes a small lenticule of tissue within the cornea, which the surgeon removes through a small keyhole incision, leaving the surface largely intact.
Both correct short-sightedness and astigmatism, and pooled evidence from systematic review shows comparable visual acuity outcomes between the two.¹
The clinically important difference is the corneal surface. Because SMILE does not raise a flap, it tends to disturb fewer corneal nerves; a meta-analysis of comparative studies found better-preserved central corneal sensitivity after SMILE than after femtosecond LASIK,² which is associated with fewer dry-eye symptoms in the early months.
Both procedures are durable: SMILE has ten-year data showing stable refraction with no late loss of vision in the eyes followed,³ building on the first prospective studies that established the technique,⁴ while LASIK carries the largest evidence base of any refractive procedure, with satisfaction above 95% in the world literature⁵ and a formal safety and efficacy endorsement from the American Academy of Ophthalmology.⁶
LASIK vs SMILE at a Glance
Factor | LASIK | SMILE | Why It Matters |
|---|---|---|---|
Corneal access | Thin flap created, then repositioned | Flapless; small keyhole incision | Affects early healing and flap precautions |
Visual outcomes | Comparable | Comparable | Both reach comparable acuity in suitable eyes |
Dry eye / sensitivity | More nerves disturbed; early dryness a little more common | More nerves spared; milder early dryness | Tear-film health affects comfort and vision quality |
Prescription range | Widest, including long-sightedness | Short-sightedness and astigmatism | Not every prescription is a SMILE prescription |
Recovery speed | Fast, often a day or two | Fast, often a day or two | Both return useful vision quickly |
Long-term data | Largest evidence base in the field | Stable outcomes to ten years | Depth of evidence supports confidence |
Lifestyle fit | Suits most | Flapless suits contact sport and impact-prone roles | Sport and occupation inform the plan |
When Each Option Wins
LASIK wins when the cornea is thick and regular enough to take a flap safely, when the prescription includes long-sightedness or needs fine astigmatic correction, or when the fastest possible recovery is the priority; it carries the largest evidence base of any refractive procedure.⁵
SMILE wins for short-sightedness and astigmatism in eyes prone to dry eye, where sparing more corneal nerves helps, and for contact-sport or impact-prone lifestyles, where a flapless cornea removes any concern about a flap; a meta-analysis found better-preserved corneal sensitivity after SMILE than after femtosecond LASIK.²
Neither wins when the cornea is too thin to take a flap but the surface is otherwise healthy; a surface treatment such as PRK or LASEK is then often the safer route to the same destination, trading a slightly longer initial recovery for removing the least tissue and leaving no flap.
ICL or lens replacement is the better answer when the cornea is too thin or too irregular for any laser, when the prescription is very high, or when age-related loss of near focus means a lens-based solution will serve better than reshaping the cornea; a clinic that offers laser, ICL and lens replacement can make that call on clinical grounds rather than on what it happens to sell.
Two practical limits often settle it. The first is corneal thickness: creating a flap uses tissue, so an eye with a thinner cornea may have the depth for SMILE or a surface treatment but not for LASIK. The second is the prescription itself: LASIK treats both long- and short-sightedness, whereas SMILE is used for short-sightedness and astigmatism, so a long-sighted eye points to LASIK by default. The assessment measures both before anything is recommended.
Recovery: What the First Weeks Look Like
For most patients the early recovery after LASIK and SMILE is broadly similar, with useful vision returning within a day or two and a return to many normal activities soon after. There are nuances. After LASIK, the flap means a short list of precautions while it settles, such as avoiding rubbing the eyes, though vision often sharpens very quickly. After SMILE, there is no flap to protect, and the smaller incision disturbs the corneal surface less, which is part of why dry-eye symptoms tend to be milder in the first months. Surface treatments such as PRK take longer to settle by comparison, but LASIK and SMILE are both quick-recovery procedures. Your surgeon will give you a tailored aftercare plan and the drops you need.
What the Consultation Actually Decides
The choice is settled on measurements, not preference. The assessment establishes four things in particular: whether the cornea is thick and regular enough to take a LASIK flap safely, or whether SMILE or a surface treatment is the safer use of tissue; whether the prescription is in range and stable, and whether it includes the long-sightedness that favours LASIK; whether the tear film is healthy, since a dry surface is treated before any laser and may tip the balance towards SMILE; and how your work and lifestyle weigh, with contact sport favouring a flapless approach. The same assessment can also conclude that no laser is the right answer, and that an implantable contact lens or lens replacement would give a better and safer result. Where LASIK and SMILE are both suitable, the final decision is a shared one between you and your surgeon.
Does the Cost Differ?
SMILE is often priced a little higher than standard LASIK, reflecting the femtosecond technology and specialist training it requires; LASIK, as the most established procedure, spans a wide price range depending on the platform and the degree of customisation. Price, though, should not drive the clinical choice. The right procedure is the one your eyes call for; where both are suitable, cost can reasonably form part of a shared decision, but it should never override suitability.
Frequently Asked Questions
Is SMILE newer, and does that make it riskier?
SMILE is more recent than LASIK, but it is no longer new; it has a decade of published outcomes and a strong safety record.
Does LASIK always cause dry eye?
No, but it disturbs more corneal nerves than SMILE, so early dry-eye symptoms are somewhat more common; they usually settle and are managed actively.
Can both treat astigmatism?
Yes; the suitability and degree are assessed individually.
How long does each take, and is it painful?
Both are day-case procedures under local anaesthetic drops, taking only minutes per eye; neither is generally painful, though you may feel pressure during treatment and some grittiness afterwards, which settles.
Will I still need reading glasses?
Both correct distance vision; as the eye ages, reading glasses may still be needed unless a presbyopia-correcting approach is chosen.
Why Offering Both LASIK and SMILE Matters
Blue Fin Vision® is a consultant-led service founded by Mr Mfazo Hove, Consultant Ophthalmic Surgeon, and it offers LASIK, TransPRK, PresbyMAX® and PRESBYOND® directly, within a single consultant-led pathway. That breadth matters for a head-to-head choice: as the Blue Fin Vision® Doctrine puts it, the recommendation must follow the anatomy, not the conversion rate, and a clinic that offers only one of the two cannot give you a neutral comparison. Here the surgeon is free to choose whichever fits your cornea, prescription and tear film. Because the same service can also recommend an implantable contact lens or lens replacement, there is no need to steer you towards either laser procedure. Where SMILE is the right option, Blue Fin Vision® can offer it through a ZEISS VisuMax pathway at EuroEyes, and we explain where each step of your care takes place before you book.
The Blue Fin Vision® Advantage means consultant-performed planning and surgery, with no technician-led lists; premium Schwind, Ziemer and ZEISS technology; corneal tomography, pachymetry and ocular-surface assessment as part of the work-up; and a systematic review of outcomes that refines planning over time. Outcomes are measured and audited, in keeping with a Mission Statement built around safety, precision, discretion and trust.
Whichever you choose, the result is backed. Under the Blue Fin Vision® enhancement policy, any enhancement needed after self-pay laser vision correction is fully covered within 24 months, with no additional cost and no cost-sharing; you know your coverage before treatment begins.
The Bottom Line
References
- Shen Z, Shi K, Yu Y, Yu X, Lin Y, Yao K. Small incision lenticule extraction (SMILE) versus femtosecond laser-assisted in situ keratomileusis (FS-LASIK) for myopia: a systematic review and meta-analysis. PLoS One. 2016;11(7):e0158176.
- He M, Huang W, Zhong X. Central corneal sensitivity after small incision lenticule extraction versus femtosecond laser-assisted LASIK for myopia: a meta-analysis of comparative studies. BMC Ophthalmol. 2015;15:15.
- Blum M, Lauer AS, Kunert KS, Sekundo W. 10-year results of small incision lenticule extraction. J Refract Surg. 2019;35(10):618-623.
- Sekundo W, Kunert KS, Blum M. Small incision corneal refractive surgery using the small incision lenticule extraction (SMILE) procedure for the correction of myopia and myopic astigmatism: results of a 6 month prospective study. Br J Ophthalmol. 2011;95(3):335-339.
- Solomon KD, Fernández de Castro LE, Sandoval HP, Biber JM, Groat B, Neff KD, Ying MS, French JW, Donnenfeld ED, Lindstrom RL; Joint LASIK Study Task Force. LASIK world literature review: quality of life and patient satisfaction. Ophthalmology. 2009;116(4):691-701.
- Sugar A, Rapuano CJ, Culbertson WW, Huang D, Varley GA, Agapitos PJ, de Luise VP, Koch DD. Laser in situ keratomileusis for myopia and astigmatism: safety and efficacy: a report by the American Academy of Ophthalmology. Ophthalmology. 2002;109(1):175-187.
ABOUT THE AUTHOR
Mr Mfazo Hove
Consultant Ophthalmic Surgeon
MBChB MD FRCOphth CertLRS
Mr Mfazo Hove is a Consultant Ophthalmic Surgeon with experience spanning more than 57,000 procedures. He completed 6.5 years of specialist training at Moorfields Eye Hospital and served for five years as a consultant at the Western Eye Hospital, Imperial College Healthcare NHS Trust. He is the founder of Blue Fin Vision®, a consultant-led private ophthalmology practice operating across London, Essex, and Hertfordshire. His clinical expertise encompasses advanced cataract surgery, refractive lens replacement, laser vision correction, and implantable Collamer lenses (ICL).
A ZEISS Key Opinion Leader, Mr Hove is a respected international speaker with five invited engagements across seven cities in 2026:
- ZEISS China tour (Changsha, Shanghai, and Hangzhou, April – ZEISS APAC User Meeting)
- RCOphth Annual Congress – May – Manchester
- ZEISS EMEA User Meeting (Istanbul)
- ZEISS Lausanne User Meeting (Lausanne)
- European Society of Cataract and Refractive Surgeons Annual Congress (ESCRS, London)
