PRK

Photorefractive keratectomy (PRK) is a type of refractive surgery used to correct myopia, hyperopia, and astigmatism. PRK was the first type of laser eye surgery for vision correction and is the predecessor to the popular LASIK procedure.

History

PRK was first performed in Germany in 1987 by Dr. Theo Seiler. It was approved by the Food and Drug Administration (FDA) in the United States in 1995.

Procedure

PRK is performed using a type of laser known as an excimer laser, which is used to reshape the cornea in the front of the eye. This is done by removing a thin layer of corneal tissue, allowing light entering the eye to be properly focused onto the retina. Unlike LASIK, PRK does not involve creating a corneal flap.

Recovery

Recovery from PRK surgery takes a bit longer than recovery from LASIK surgery. It may take a few days for new epithelial cells to regenerate and cover the wound on the surface of the eye. During this time, a bandage contact lens is worn. Vision will continue to improve over the course of several weeks.

Risks and Complications

As with any surgery, there are potential risks and complications associated with PRK. These may include infection, haze, slow healing time, regression, under correction or over correction, and corneal scarring.

See Also

• LASIK
• Refractive surgery
• Myopia
• Hyperopia
• Astigmatism