PRK (Photorefractive Keratectomy) is a type of laser eye surgery used to correct refractive errors such as nearsightedness (myopia), farsightedness (hyperopia), and astigmatism. Unlike LASIK (Laser-Assisted In Situ Keratomileusis), PRK does not involve creating a corneal flap but instead directly reshapes the outer layer of the cornea to improve vision.

Here's how PRK eye operation works:

Preoperative Evaluation: Before undergoing PRK, patients undergo a comprehensive eye examination to assess their eye health and determine their candidacy for the procedure. This evaluation includes measuring the corneal thickness, refractive error, pupil size, and overall eye health.

Anesthetic Eye Drops: On the day of the procedure, numbing eye drops are applied to ensure the eye remains comfortable and pain-free throughout the surgery.

Corneal Epithelium Removal: In PRK, the outer layer of the cornea (called the epithelium) is gently removed using a specialized instrument or with the help of an excimer laser. This step differs from LASIK, where a corneal flap is created and lifted.

Laser Reshaping: After the epithelium is removed, an excimer laser is used to precisely reshape the underlying corneal tissue. The laser emits ultraviolet light pulses, which are computer-controlled to remove microscopic amounts of corneal tissue in a predetermined pattern based on the patient's refractive error.

Vision Correction: The laser reshaping of the cornea aims to correct the specific refractive error, whether it's nearsightedness, farsightedness, or astigmatism. By changing the curvature of the cornea, the laser allows light to focus properly on the retina, resulting in clearer vision without the need for glasses or contact lenses.

Postoperative Care: After the laser treatment, a bandage contact lens is placed on the eye to protect the cornea and promote healing. Patients are instructed to use antibiotic and anti-inflammatory eye drops to prevent infection and reduce inflammation during the initial healing phase.

Recovery Process: The recovery from PRK typically involves several days to weeks. During this time, the epithelium regenerates and covers the treated area. Patients may experience blurred vision, discomfort, light sensitivity, and tearing during the first few days after surgery. Vision gradually improves as the eye heals.

Follow-Up Visits: Patients are scheduled for follow-up visits with their eye surgeon to monitor the healing progress and evaluate the visual outcome. Adjustments to medications or additional treatments may be recommended based on individual healing responses.

Advantages of PRK:

No Corneal Flap: Since PRK does not involve creating a corneal flap like LASIK, it eliminates the risk of flap-related complications such as flap dislocation or flap-related dry eye syndrome.

Suitable for Thin Corneas: PRK may be suitable for patients with thinner corneas who are not candidates for LASIK.

Less Risk of Ectasia: PRK may be preferred for patients at higher risk of developing corneal ectasia (a rare but serious complication) after refractive surgery.

Disadvantages of PRK:

Longer Recovery Time: The visual recovery process is typically slower with PRK compared to LASIK, as the epithelium needs time to regenerate and heal.

Discomfort During Healing: Patients may experience more discomfort and sensitivity during the initial healing phase due to the removal of the epithelium.

Potential Haze Formation: Some patients may develop corneal haze during the healing process, affecting visual clarity temporarily.

Know more about PRK eye procedure

Overall, PRK is a safe and effective procedure for correcting refractive errors, offering an alternative to LASIK for patients who may not be suitable candidates for flap-based surgeries. The decision to undergo PRK should be made after a thorough consultation with an experienced eye surgeon who can assess individual suitability and explain the potential benefits and risks of the procedure. To know more about PRK eye procedure or PRK eye operation, you can visit the website.