Common Questions and Concerns about Photorefractive Keratectomy (PRK)

If you are considering undergoing laser refractive surgery, chances are that you have a number of questions about your various options.  Below you will find answers to some of the questions most commonly asked by ophthalmologic patients about photorefractive keratectomy – or PRK – one of the most popular refractive surgical procedures.

What is the difference between PRK and LASIK?

PRK and LASIK surgeries both use an excimer laser to reshape the cornea, eliminating the corneal imperfections that are responsible for unclear vision.  However, in LASIK surgery, a flap must be created in the outermost layer of the cornea, called the epithelium, using either a fine blade known as a microkeratome or a laser.  In PRK, the epithelium is removed altogether to give the laser surgeon access to the underlying corneal tissue.

Why would I choose to undergo PRK instead of LASIK?

LASIK surgery requires sufficient thickness of the epithelium to create a corneal flap.  Patients with thin corneas may be unable to undergo LASIK, making PRK a potentially ideal alternative.

What are the advantages of PRK surgery?

Patients who undergo PRK surgery achieve the same excellent results as those who undergo LASIK but do not have to worry about the possibility of complications with the corneal flap.  The epithelial cells grow back over time, and the eye completely regains its structural integrity.

What are the disadvantages of PRK surgery?

Because the epithelium is completely removed, there is a greater chance of discomfort after PRK surgery than there is with LASIK.  The healing period is also significantly longer with PRK, as the removed cells take weeks to re-grow.  Optimal visual acuity may also take longer with PRK than with LASIK.

Are there alternatives to PRK surgery?

A third variation on laser refractive surgery is LASEK, in which an alcohol solution is used to loosen the epithelial cells.  Your LASIK surgeon will discuss your options with you and advise you of the best surgical solution in your case during a consultation and evaluation of your eyes.

For more information on PRK, contact our Long Island area LASIk doctors. They will be able to answer your questions related to laser vision correction and other alternatives for patients who cannot have LASIK surgery.