The technique of corneal refractive surgery with SMILE

Corneal refractive surgery with SMILE is an ophthalmologic technique used to correct refractive defects such as:

  • Myopia
  • Hyperopia
  • Astigmatism

This would make it possible to dispense with the use of contact lenses or glasses. For this, the curve of the cornea is modified in order to achieve a reduction of diopters. In recent years this technique has been perfected until, at present, it has achieved considerable levels of safety and patient satisfaction.

What laser techniques are available to perform corneal surgery?

  • PRK (Photorefractive Keratotomy)

PRK was the first laser technique used to perform refractive surgery. It is based on removing the corneal epithelium and then correcting the refractive defect with laser. After treatment, a therapeutic contact lens must be worn in the operated eye for the first five days.


This is a technique in which a circular incision is made in the cornea, leaving a junction end. The laser is then applied to correct the refractive defect and the lenticule is put back in place.

  • SMILE Corneal Refractive Surgery

Small Incision Lenticule Extraction (SMILE) corneal refractive surgery is a much less incisive surgical procedure than LASIK. Since it only requires a microincision of 2 millimeters. It is the most advanced corneal refractive surgery treatment.

What are the advantages of the SMILE technique in corneal refractive surgery?

Although all three are very similar in terms of accuracy of results and safety, SMILE has certain advantages:

  • It is less invasive, thus allowing for anatomical stability of the cornea. For this reason, it is a great option for athletes or people with risky professions.
  • It is suitable for all types of myopia, whether the refractive error is low or high.
  • It causes less dryness of the eye and the eye recovers its normal lubrication and tearing more quickly.