SMILE Surgery (Small Incision Lenticule Extraction)
SMILE (Small Incision Lenticule Extraction)
SMILE (Small Incision Lenticule Extraction) is the latest advancement in laser vision correction. It is a flapless, minimally invasive procedure used to treat nearsightedness (myopia) and astigmatism. Unlike LASIK, which requires creating a large circular flap, SMILE utilizes a single high-precision laser to perform the entire correction through a microscopic opening.
When You Should Consider SMILE
Active Lifestyles: Ideal for individuals involved in contact sports, professional athletics, or high-intensity professions where a corneal flap displacement risk must be zero.
Dry Eye Concerns: For patients prone to dry eyes, as the procedure preserves more corneal nerves than traditional refractive surgeries.
Nearsightedness (Myopia): Specifically designed for patients with high degrees of myopia who have adequate corneal thickness.
Astigmatism: Effective for correcting blurred vision caused by an irregularly shaped cornea.
Structural Preference: For those who prefer a procedure that maintains the maximum structural integrity of the upper corneal layers.
How Is Performed
Numbing: Anesthetic drops are applied to the eye so the patient remains awake and comfortable, feeling no pain during the process.
Lenticule Creation: Using the VisuMax femtosecond laser, the surgeon creates a thin, contact-lens-shaped layer of tissue (a lenticule) inside the intact cornea.
Small Incision: The same laser creates a microscopic incision—typically less than 4 mm—on the corneal surface.
Extraction: The surgeon manually removes the lenticule through this tiny incision, which reshapes the cornea and allows light to focus correctly on the retina.
Quiet & Odourless: The laser operates silently, and unlike other methods, there is no "burning" smell during the correction.
Duration: The entire process usually takes about 10–15 minutes for both eyes.
Pre-Procedure Preparation
Corneal Topography: Detailed mapping of the eye's surface to ensure the curvature is suitable for the lenticule extraction method.
Contact Lens Holiday: Patients must stop wearing contact lenses for a specified period (usually 1–2 weeks) to allow the cornea to reach its natural shape.
Tear Film Analysis: Assessing the quality of the tear film to establish a baseline for post-operative comfort.
Fasting: Following clinical instructions regarding food and water intake on the morning of the procedure.
Logistics: Arranging for a ride home, as vision may be "foggy" immediately following the laser application.
Tests Before SMILE
Pachymetry: Measuring corneal thickness to confirm there is enough tissue to safely create and remove the lenticule.
Refraction Test: A precise measurement of your prescription to program the laser for the exact correction needed.
Slit-Lamp Exam: A microscopic evaluation to ensure the cornea is clear and free of any underlying structural issues or infections.
Pupillometry: Measuring pupil size in different lighting conditions to optimize the treatment zone and prevent night vision issues.
Life After SMILE
Vision Restoration: Most patients see clearly within 24 hours, though full stabilization of the vision may take a few days.
Medication: Use of prescribed antibiotic and lubricating eye drops for several weeks is necessary to ensure smooth healing.
Fast Return to Activity: You can typically return to sports, swimming, and wearing makeup much sooner—often within 3–5 days—than with traditional methods.
Post-Op Symptoms: Some temporary light sensitivity or a "halo" effect around lights at night may occur during the first few weeks of healing.
Follow-up: Scheduled checkups allow the surgeon to monitor the microscopic incision site and confirm the new corneal shape is focusing light correctly.
Why Specialized Treatment Is Highly Effective
No Flap Complications: Since no flap is created, there is zero risk of flap displacement, "folds," or epithelial ingrowth.
Superior Stability: Leaves the strongest, outermost layers of the cornea mostly untouched, preserving more of the eye's natural biomechanical strength.
Reduced Dry Eye Risk: Because fewer corneal nerves are severed during the small incision, the risk and severity of post-operative dry eye syndrome are significantly lower.
High Precision: The use of a single, highly advanced femtosecond laser reduces the number of steps and specialized tools required for the correction.
Minimally Invasive: The tiny incision heals very quickly, often resulting in less discomfort and a faster return to a high-intensity lifestyle.