Photorefractive Keratectomy
Photorefractive Keratectomy
Photorefractive Keratectomy (PRK) is another type of refractive eye surgery, similar to LASIK, that is used to correct vision problems like nearsightedness (myopia), farsightedness (hyperopia), and astigmatism. It reshapes the cornea to improve vision without the need for glasses or contact lenses. PRK differs from LASIK in that it doesn’t involve creating a flap on the cornea.
Here's an overview of the PRK procedure:
Preoperative Evaluation
Just like with LASIK, before the surgery, you’ll undergo a thorough eye examination to determine if you are a suitable candidate for PRK. This includes assessing the thickness and shape of your cornea, measuring your refractive error, and checking for other eye conditions.
Removal of the Epithelium
Instead of creating a flap, the outer layer of the cornea, called the epithelium, is gently removed using an alcohol solution or a special brush. This allows the surgeon to access the underlying corneal tissue.
Reshaping the Cornea
A specialized excimer laser is then used to remove a precise amount of corneal tissue based on your specific refractive error. This reshapes the cornea so that light entering the eye is properly focused onto the retina.
Postoperative Care
After the cornea is reshaped, a protective contact lens is placed on the eye to facilitate healing. You’ll receive instructions for postoperative care, which may include using prescribed eye drops to promote healing and reduce the risk of infection.
Recovery
It can take a few days for vision to stabilize after PRK. During this time, you may experience some discomfort or blurry vision.
Epithelial Regrowth
The removed epithelium naturally regrows over a few days to a week. During this time, you may be given pain relievers and topical antibiotics to help with healing.
Follow-up Appointments
Like with LASIK, you’ll have several follow-up appointments with your eye surgeon to monitor your progress and ensure that your eyes are healing properly.
PRK is a well-established procedure that has been performed for several decades. It can be an excellent option for individuals who may not be suitable candidates for LASIK, such as those with thinner corneas or certain corneal conditions.
As with any surgical procedure, PRK carries some risks, and not everyone is a candidate. It’s important to consult with a qualified ophthalmologist or refractive surgeon to determine the best treatment option for your specific circumstances. Keep in mind that medical practices and technologies may evolve, so always seek the most current information from a qualified healthcare professional.