PRK (photorefractive keratectomy) is a technique of refractive surgery, laser operation of vision. During the operation, the laser performs an ablation of the surface of the cornea to permanently change its refractive power and restore your vision.
Performed under local anesthesia, it is therefore not painful.
PRK addresses myopia between - 1.5 and - 7 diopters, as well as astigmatisms up to - 4 diopters.
Progress of the operation with PRK
Anesthesia is obtained by instilling several drops of anesthetic eye drops.
If astigmatism correction is planned, the doctor will mark the horizontal axis of the eye with a felt-tip pen.
The patient is placed on the operating table and must fix a point.
The doctor will put on a device to hold the eyelids apart.
He will then remove the very superficial layer of the cornea (the epithelium) by scraping it with a brush or an instrument. He asks the patient to focus on the light point in front of him.
The laser will start. It is not difficult to keep the eye still for a few seconds. But for added safety, the laser has an attachment system that follows small movements that the patient may not be able to control. The doctor's hands frame the patient's face and his voice accompanies the entire procedure. After an exposure of a few tens of seconds, the procedure is practically complete.
Finally, we instill an antibiotic and anti-inflammatory eye drops and then place a soft contact lens as a dressing.
After the operation, varying pain depending on the patient, can usually appear within the first 2-3 days. Finally, final visual acuity is only achieved after about 1 to 3 months.
If optical aberrations are observed by the ophthalmologist before the operation, it is possible to correct them simultaneously with your operation for the correction of ametropia (myopia or astigmatism).
A sleeping pill, sedatives and eye compresses are prescribed systematically. You can go home straight away after the operation.
A bandage is not necessary. However, it is important not to rub your eye as you may lose the lens. Antibiotic eye drops (drops) should be instilled 4 times a day, directly on the lens, as well as artificial tears.