Refractive and Presbylaser Surgery

What are the alterations of refraction?
In a normal eye, the outside image is modified by the cornea and the lens to focus on the retina. In general, short-sighted (myopia) eyes are bigger and place the image in front of the retina whereas long-sighted (hypermetropia) eyes are smaller and place the image behind the retina. Astigmatism develops an alteration in the corneal curvature.


Refractive surgery techniques have the aim to reduce or eliminate the patients’ necessity to wear glasses or contact lenses. It does not act on the rest of structures of the eye, such as the retina since they can have previous problems not related to the surgery.


What is refractive surgery, LASIK or Laser in situ Keratomileusis assisted with Excimer Laser?
The surgery with Excimer laser modifies the surface of the cornea through a cut and a later reduction of the thickness of the cornea in order to correct the refractive problem: myopia, hypermetropia or astigmatism.

LASIK surgical procedure is performed with anesthesic eyedrops; then, a corneal flat consisting in a thin layer of superficial corneal tissue is created. Laser beams are applied on the corneal “bed”. Then the corneal flap is re-positioned.

It is performed in the operating theatre following the required hygienic measures. The patient’s collaboration is important.


After surgery, some discomfort such as tearing or red eyes… may appear but they will resolve in few days.


Post-operative evolution normally allows patients to resume normal activities quickly. It requires the use of eyedrops and, occasionally, a general treatment.


Pre-operative instructions

  • No using contact lenses in the previous days. A minimum of seven days, if the lenses are soft; and, 15 days if they are rigid.
  • No using make-up, hairspray, creams or perfumes the day of the surgery.
  • Your hair must be recently washed and tied back.
  • You must avoid wearing jewellery during the surgery.
  • If you wear a pacemaker, it is important to inform your doctor before.
  • During three days before the operation, and after washing your face, you must use “lephadosis” (sterilized cleaning pads) twice a day, in the morning and at night, one for each eye and for the correct hygiene of eyelids.

Post-operative advices
The first week after the operation:

  • Do not touch your eyes.
  • Do not use make-ups.
  • Do not have baths in the sea, swimming-pools, sauna, UV radiation…
  • Avoid polluted or dusty environments.
  • Use protective sun-glasses in the street.

During the month after the operation:

  • Do not rub your eyes.
  • Avoid contact sports (basketball, handball, football, judo…)
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