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Photorefractive Keratectomy (PRK) is a laser surgery procedure. It is used to correct eye refractive errors. PRK is performed using Excimer Laser technology and is particularly effective in correcting eye defects such as myopia, hyperopia and astigmatism.
The PRK procedure includes the following steps:
1-Preliminary Evaluation: The patient is evaluated by an ophthalmologist to determine if he or she is a suitable candidate for PRK. This evaluation includes an eye exam, measurement of corneal thickness, eye topography and refraction tests.
2-Anesthesia Process: PRK is performed under local anesthesia. The surface of the eye is usually numbed using anesthetic drops or gels.
3-Removal of Epithelium: In PRK, it is necessary to remove the epithelium, the top layer of the cornea. This step is performed using a chemical solution or surgical instruments.
4- Laser Reshaping: After the epithelium is removed, the Excimer laser device is focused on the middle layer of the cornea. The laser changes the shape and thickness of the cornea, allowing light to be properly focused towards the retina of the eye.
5-Healing of the Epithelium: Once the laser has completed the reshaping, the epithelium is allowed to heal. This process can take several days and the patient usually wears bandages, contact lenses or a medical dressing during this time.
PRK differs from other laser vision correction procedures, such as LASIK, because the epithelium, the top layer of the cornea, needs to be removed, so the healing process may take a little longer and there may be more discomfort. However, PRK may be a suitable option for patients with certain risks to the corneal structure or for patients whose cornea is not thick enough.
The content of our website is for informational purposes. It does not constitute a diagnosis or treatment recommendation. An ophthalmologist should be consulted for definitive diagnosis and treatment.
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