Source-backed guidance for SMILE eye surgery preparation covering candidacy requirements, recovery expectations, and practical planning steps for international patients.
Last reviewed: 2026-05-06
9 min read
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Content is educational and planning-oriented. It does not replace diagnosis, treatment, or personalized medical advice from a licensed healthcare professional. Outcomes vary by individual case.
SMILE is a flapless laser vision correction procedure suitable for myopia between -1.00 and -10.00 diopters with up to -3.00 diopters of astigmatism
Candidacy requires a stable prescription for at least 12 months, adequate corneal thickness, and good overall eye health
Recovery typically involves clear vision within 24-48 hours, with full stabilization taking several weeks
A comprehensive pre-operative evaluation by a qualified surgeon is essential to determine if SMILE is appropriate for your individual circumstances
Educational information only
This content is general education and does not replace evaluation by a licensed clinician. If you have symptoms, complications, or urgent concerns, seek in-person medical care.
What Is SMILE Eye Surgery?
SMILE (Small Incision Lenticule Extraction) represents an advancement in laser vision correction technology. For patients exploring various eye care resources, understanding the options available helps in making informed decisions about vision correction. Unlike traditional LASIK procedures that create a corneal flap, SMILE uses a femtosecond laser to create a small lens-shaped piece of corneal tissue called a lenticule, which is then extracted through a tiny 2-5mm incision S1. This flapless approach may offer advantages for certain patient populations.
The procedure has been performed globally since 2011, with over 10 million procedures completed worldwide S3. It received FDA approval for myopia correction and has since expanded to include astigmatism treatment. The femtosecond laser creates the lenticule within the cornea with precision, and the surgeon then removes this tissue through the small incision, effectively reshaping the cornea to correct vision.
Recovery after SMILE typically involves relatively rapid visual improvement. Many patients notice clearer vision within 24-48 hours after the procedure, though complete visual stabilization may take several weeks S3. The recovery experience can vary between individuals based on personal healing characteristics and the specifics of their prescription correction.
How SMILE Differs from LASIK
Unlike LASIK, which creates a 20-24mm corneal flap that is lifted during the procedure, SMILE requires only a small 2-5mm incision. This distinction means no flap is created, which may eliminate flap-related complications and potentially offer better long-term corneal biomechanical stability in some cases.
Who Is a Good Candidate for SMILE?
Determining candidacy for SMILE requires a comprehensive evaluation by a qualified refractive surgeon. While general guidelines exist, each patient's individual anatomy and visual needs must be assessed by our experienced surgeons to determine whether SMILE is the most appropriate option for their specific circumstances S4.
Age and Prescription Requirements
Candidates must be at least 18 years of age, as vision prescription changes typically stabilize in early adulthood. More importantly, the prescription should have remained stable for at least 12 months prior to the procedure. This stability requirement helps reduce the likelihood that the correction applied will need to be revised S3.
SMILE is FDA-approved for myopia between -1.00 and -10.00 diopters, with up to -3.00 diopters of astigmatism S4. Patients outside these parameters may not be suitable candidates for SMILE, though other vision correction options may be available. Your surgeon will measure your exact prescription and corneal characteristics during the consultation to assess suitability.
Health Considerations
Adequate corneal thickness is essential for SMILE candidacy. The procedure requires sufficient corneal tissue to safely create and extract the lenticule while maintaining appropriate residual corneal thickness. Surgeons use detailed corneal mapping during evaluation to confirm adequate tissue is present S3.
Certain health conditions may exclude patients from SMILE candidacy. These include advanced glaucoma, uncontrolled diabetes, corneal abnormalities or disease, excessive corneal scarring, cataracts, pregnancy, and nursing S4. A history of previous eye surgery or eye disease may also affect eligibility. Be prepared to discuss your complete medical and ocular history during consultation.
Comparing SMILE to LASIK
Clinical research has demonstrated that SMILE achieves comparable efficacy, safety, and predictability to LASIK for myopia correction. A meta-analysis of 27 studies involving 4,223 eyes found no significant differences between SMILE and LASIK in terms of the proportion of eyes achieving 20/20 uncorrected visual acuity, safety outcomes measured by lines of corrected visual acuity lost, or the predictability of refractive outcomes S2.
However, SMILE offers specific advantages that may make it preferable for certain patients. The flapless procedure eliminates risks associated with corneal flap complications, which, while rare, can occur with LASIK S1. Because fewer corneal nerves are disrupted during SMILE, patients may experience fewer dry eye symptoms post-operatively compared to LASIK in some cases.
The structural integrity of the cornea may be better preserved with SMILE since no flap is created. This biomechanical advantage can be particularly relevant for patients with active lifestyles, those who participate in contact sports, or individuals in physically demanding occupations where eye trauma is a concern S1. The small incision also heals quickly and typically does not require stitches.
Understanding the Risks
While SMILE has demonstrated a strong safety profile in clinical studies, understanding potential risks helps patients make informed decisions about their vision correction options. Individual results may vary based on personal healing response and anatomy.
Important Medical Considerations
SMILE is not suitable for everyone. A comprehensive eye examination by a qualified surgeon is required to determine candidacy. Patients with unstable prescriptions, certain eye conditions, or systemic diseases may not be eligible. Individual results may vary; outcomes depend on personal healing response and anatomy. This checklist is educational only and does not replace professional medical consultation.
Common Temporary Side Effects
Some patients experience temporary visual disturbances during the healing process. These may include dry eye symptoms, halos or glare around lights (particularly at night), mild fluctuating vision during the stabilization period, and temporary light sensitivity S2. These effects typically diminish over weeks to months as the eye fully heals.
Important Considerations
Long-term data beyond 10 years remains relatively limited, as SMILE is a newer procedure compared to LASIK S3. Enhancement procedures after SMILE may be more technically challenging than after LASIK, should additional correction be needed in the future. Patients should discuss their expectations and any concerns with their surgeon during consultation.
Recovery After SMILE
The recovery experience following SMILE tends to be relatively comfortable for many patients. Understanding what to expect can help you plan appropriately for the procedure and post-operative period.
Immediate Post-Operative Period
Following the procedure, you may experience mild discomfort, tearing, or a foreign body sensation for the first several hours. Many patients are able to see adequately to perform light activities by the next day S3. Vision typically continues to improve and stabilize over the subsequent weeks.
Your surgeon will provide specific post-operative instructions, including prescribed eye drops to promote healing and reduce inflammation. Attending all scheduled follow-up appointments at our accredited facilities allows your surgeon to monitor your healing progress and address any concerns promptly.
Activity Guidelines
Many patients can return to normal activities, including work, within 1-3 days after the procedure. However, you should avoid rubbing your eyes, swimming, or exposing your eyes to water for a period specified by your surgeon. Detailed activity restrictions and timelines will be provided based on your individual recovery progress.
International Patient Considerations
If you are traveling internationally for your SMILE procedure, plan to remain in the area for the recommended post-operative monitoring period before returning home. Coordinate with your care team to ensure appropriate follow-up arrangements can be made with a local eye care provider once you return home. Our travel coordination services can help arrange accommodation, transportation, and follow-up care planning.
Your SMILE Preparation Checklist
The following checklist helps you prepare for your SMILE consultation and procedure. Use it as a starting point and discuss any questions with your surgeon.
Before Your Consultation
[ ] Verify your prescription has been stable for at least 12 months
[ ] Discontinue contact lens use as directed before your evaluation (typically 2-4 weeks for soft lenses, longer for hard lenses)
[ ] Gather any previous eye examination records or prescriptions
[ ] List all current medications and supplements
[ ] Note any eye conditions, injuries, or surgeries in your personal or family history
[ ] Prepare questions about SMILE compared to other vision correction options
Pre-Procedure Checklist
[ ] Complete all required pre-operative testing and measurements
[ ] Review and understand the informed consent documents
[ ] Arrange transportation for the day of surgery (you will not be able to drive immediately after)
[ ] Plan adequate recovery time in your schedule
[ ] Follow all pre-operative instructions regarding medications, food, and drink
[ ] Confirm your post-operative care plan and follow-up appointment schedule
Post-Procedure Care
[ ] Attend all scheduled follow-up appointments
[ ] Use prescribed eye drops exactly as directed
[ ] Avoid rubbing or touching your eyes
[ ] Protect your eyes from water, dust, and bright light as instructed
[ ] Report any unusual symptoms (severe pain, sudden vision changes, excessive discharge) to your surgeon immediately
[ ] Avoid swimming, hot tubs, and eye makeup for the recommended period
Next Steps
If you are considering SMILE vision correction and would like to explore your options, the next step is a comprehensive consultation with a qualified refractive surgeon. During this evaluation, your surgeon will assess your candidacy, discuss your vision goals, and recommend the most appropriate eye treatment options for your individual circumstances.
Making the Most of Your Consultation
Bring your questions prepared in advance, request information about your surgeon's experience and outcomes, and ask to see detailed information about the procedure, recovery expectations, and costs. A thorough consultation helps ensure you can make an informed decision about your vision correction options.
For international patients planning SMILE surgery, we can help coordinate your consultation, travel arrangements, and post-operative care. Our team works with experienced refractive surgeons at accredited facilities to support your journey to clearer vision.
1.Doane JF, Cauble JE, Rickstrew JJ, Tuckfield JQ. “Small Incision Lenticule Extraction SMILE – The Future of Refractive Surgery is Here.” Missouri Medicine. 2018. Accessed 2026-02-19.https://pmc.ncbi.nlm.nih.gov/articles/PMC6139791/
2.Yan H, Gong LY, Huang W, Peng YL. “Clinical outcomes of small incision lenticule extraction versus femtosecond laser-assisted LASIK for myopia: a Meta-analysis.” International Journal of Ophthalmology. 2017. Accessed 2026-02-19.https://pmc.ncbi.nlm.nih.gov/articles/PMC5596231/
