SMILE Surgery: Bladeless, Minimally Invasive Vision Correction
SMILE (Small Incision Lenticule Extraction) is one of the newest advances in laser vision correction — no flap, no blade, just a tiny keyhole incision.
What Is SMILE?
SMILE stands for Small Incision Lenticule Extraction. Using a femtosecond laser, the surgeon creates a small disc of corneal tissue (a “lenticule”) within the cornea, then removes it through a tiny 2–4mm incision — reshaping the cornea to correct your prescription without ever creating a large flap.
How SMILE Differs From LASIK
- No corneal flap – the incision is a fraction of the size of a LASIK flap, preserving more corneal nerve fibers and structural strength.
- Single laser – the entire procedure uses one femtosecond laser, rather than two different lasers.
- Potentially less dry eye – because fewer corneal nerves are disrupted, some patients experience less post-operative dryness than with LASIK.
Cross-section of the human eye (Wikimedia Commons, CC BY-SA 3.0)
Who Is a Good Candidate?
SMILE is primarily used to correct myopia and myopic astigmatism. It's an appealing option for people with moderate to high nearsightedness, active lifestyles or contact sports, and those who want a flapless alternative to LASIK. A comprehensive pre-surgical evaluation determines whether SMILE, LASIK, or PRK best suits your eyes.
The Procedure and Recovery
The procedure itself takes just a few minutes per eye. Most patients notice clear vision within a day or two, similar to LASIK, with mild dryness or light sensitivity in the initial days that resolves over the following weeks.
The Takeaway
SMILE represents the newest generation of laser vision correction — combining LASIK-like speed of recovery with a smaller incision and potentially gentler impact on the cornea's nerve network. Ask your surgeon whether your prescription and corneal profile make you a good candidate.