Dr. Gonzalo Anzueto
¿WHAT IS LASER SURGERY TO CORRECT VISION PROBLEMS?
It is a safe procedure that modifies the corneal curvature, remodeling it and allowing images to be focused in the retina in a permanent manner. Patients that previously used eyeglasses or contact lenses to correct myopia (short-sightedness), hypermetropia (farsightedness) or astigmatism now find an alternative in excimer laser.
¿IS IT ADVISABLE TO OPERATE BOTH EYES AT ONCE?
Both eyes are done at the same time, as there is no surgical risk and recovery is faster.
¿WHAT ARE THE SURGICAL TECHNIQUES?
Using a microkeratome, a flap of corneal tissue is raised (epithelium and part of the stroma), fastening it to the side. The exposed stroma is treated with Excimer Laser and once the corneal curvature is modified, the flap is once again put in place without suture or stitches.
PRK (PHOTORETRACTIVE KERATECHTOMY)
The corneal epithelium is removed, Excimer Laser is applied to the exposed corneal stroma and the patient’s vision defect is corrected. A soft contact lens is placed immediately after as protection during recovery of the removed epithelium, and that contact lens is removed 5 days later.
It is a modification of the two previous procedures. A special solution is used to separate a fine layer of epithelium tissue from the cornea, which remains adhered. Excimer laser is applied to the exposed stroma, and the tissue layer is returned to its original position. Them a contact lens is placed to protect the operated area during the 5 day recovery period.
¿AM I A CANDIDATE FOR SURGERY WITH EXCIMER LASER?
- Patients must be at least 21 years old (this will ensure the eye has matured and is adequately developed) and not older than 65, to ensure good visual results.
- The optical power of the patient’s eyeglasses must be stable for at least one year before undergoing surgery.
- No congenital anomalies must be present in the eye.
- Female patients must not be pregnant or breastfeeding during surgery, as hormones cause fluctuations in the internal tissue of the eye, changing the refractive error.
- Patients undergo a complete ophthalmological exam, topography and pachymetry of both eyes to evaluate if they comply with all requirements to undergo surgery.