Refractive surgery

Say good bye to your glasses and contact lenses

What is refractive surgery?

Refractive surgery aims to surgically correct refractive errors (myopia, hyperopia, astigmatism and presbyopia) so that objects are correctly focused on the retina.

On a general basis, this type of surgeries change the cornea’s curvature using laser procedures. However, in some cases, patients do not meet the requirements for laser surgery and intraocular lens have to be used to correct their refractive errors.


Laser procedures

  • LASIK - Laser-Assisted in Situ Keratomileusis
  • PRK - Photorefractive Keratectomy
  • ReLEx SMILE - Small-Incision Lenticule Extraction

When using Excimer Laser, Wavefront TM system which reduces the risk of inducing higher-order aberrations can be applied.


Generally this type of interventions last no longer than 8 to 10 minutes and once finished the patient is able to tell the time looking at a wall clock.

Dr. Luis Alonso | Refractive Surgeon

Intraocular procedures

If the patient cannot be treated using laser (due to severe refractive errors, excessively thin cornea...), refractive errors can be corrected using intraocular lens implant which, according to the characteristics of the patient’s eye, can be:

  • INTRACORNEAL LENS (for Presbyopia: Kamra or Raindrop)
  • PHAKIC LENS
    • Angle-supported anterior chamber IOL
    • Iris-supported anterior chamber IOL
    • Posterior chamber IOL (ICL)
  • PSEUDOPHAKIC LENS

Inclusion criteria

Patients must have a series of characteristics in order to undergo refractive surgery (regardless of the surgical procedure carried out).

  • Be above 18 years old so that eye development has finished.
  • Stable vision acuity for at least for one year, which means that the refractive error has not changed over this period of time. If this is not the case, it could come back again after surgery.
  • Previous good visual acuity.
  • No corneal infections or lesions over the past year, specially no herpetic infections.
  • Not suffer from autoimmune disorders such as Sjögren syndrome or Lupus.
  • Women shall not be pregnant or during lactation period, as hormonal and metabolic changes may affect visual acuity.

FAQ Refractive Surgery


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