A Minimally Invasive Laser Vision Correction Procedure
SMILE (Small Incision Lenticule Extraction) is a newer refractive surgery technique designed to correct vision with less disruption to the cornea than traditional LASIK. It uses advanced femtosecond laser technology to reshape the eye through a very small incision, without creating a corneal flap.
This page explains what SMILE is, how it works, who it’s best suited for, and how it compares to other laser vision correction options.
What Is SMILE?
SMILE is a laser-based refractive surgery used primarily to correct:
- Nearsightedness (myopia)
- Astigmatism (in select cases)
Unlike LASIK, SMILE does not require creating a large corneal flap. Instead, the laser creates a small piece of tissue (called a lenticule) inside the cornea, which is removed through a tiny incision.
This approach preserves more of the cornea’s natural structure.
How SMILE Works
SMILE is performed in a single laser step:
- A femtosecond laser creates a thin lenticule within the cornea
- A small incision (about 2–4 mm) is made
- The surgeon removes the lenticule through the incision
- The cornea reshapes naturally, correcting vision
No flap is created, and no excimer laser is used.
What Happens During SMILE Surgery
SMILE is typically:
- Performed in an outpatient setting
- Completed in about 10–15 minutes per eye
- Done with numbing eye drops
Patients are awake and comfortable. Most describe mild pressure but no pain.
What Patients See and Feel During SMILE
During the procedure, patients may notice:
- Pressure sensations
- Dim or changing lights
- Temporary visual blur
These sensations are brief and expected.
SMILE Recovery and Healing
Recovery after SMILE is generally smooth, though slightly different from LASIK.
Most patients:
- Notice vision improvement within days
- Experience less early dryness than LASIK
- Return to normal activities quickly
Vision continues to sharpen over the following weeks.
How SMILE Compares to LASIK
SMILE
- No corneal flap
- Smaller incision
- Less corneal nerve disruption
- Lower risk of flap-related complications
LASIK
- Faster initial clarity for some patients
- More procedure versatility
- Treats a wider range of prescriptions
Neither is “better” universally — each serves different patients.
SMILE vs PRK
SMILE
- Faster recovery than PRK
- Less discomfort
- No surface healing required
PRK
- No flap
- Longer healing time
- Often used when corneas are thin
Procedure choice depends on anatomy and goals.
Who Is a Good Candidate for SMILE?
SMILE may be ideal for patients who:
- Are nearsighted with or without astigmatism
- Have healthy corneas
- Prefer a flap-free procedure
- Are active or in contact sports
- Want reduced dry eye risk
A comprehensive evaluation determines candidacy.
When SMILE May Not Be the Best Option
SMILE may not be recommended if:
- Farsightedness is present
- Prescriptions fall outside approved ranges
- Corneal anatomy is unsuitable
In these cases, LASIK, PRK, or lens-based options may be better.
Dry Eye and SMILE
Because SMILE preserves more corneal nerves:
- Post-operative dry eye symptoms may be reduced
- Long-term comfort may be improved
This makes SMILE appealing for patients prone to dryness.
Is SMILE Safe?
SMILE has a strong safety record when performed by experienced surgeons and on appropriate candidates.
As with all refractive procedures:
- Careful screening is essential
- Surgeon experience matters
Serious complications are uncommon.
How Long Do SMILE Results Last?
SMILE permanently reshapes the cornea. However:
- Vision can still change naturally with age
- Presbyopia may still develop later in life
SMILE improves vision — it does not prevent aging-related changes.
Can SMILE Eliminate Glasses?
Many patients experience significant reduction in dependence on glasses or contacts.
However:
- Some may still need glasses occasionally
- Reading glasses are common after age 40
Realistic expectations are important.
Why Surgeon Guidance Matters
Not all patients are candidates for SMILE. Surgeon guidance ensures:
- Proper procedure selection
- Safe outcomes
- Long-term satisfaction
Choosing the right surgery matters more than choosing the newest one.
Surgeon-Led SMILE Education You Can Trust
At Eye Surgery Today, SMILE education is grounded in clinical judgment and real patient outcomes — not trends. Our goal is to help patients understand whether SMILE fits their eyes, lifestyle, and long-term vision goals.
