LASIK versus PRK

Refractive errors occur when the cornea of your eye, or the front part of your eye, is misshaped. These refractive errors produce nearsightedness, farsightedness, or astigmatism. Laser vision correction is the procedure through which a laser is used to reshape the cornea of the eye, in order to achieve better vision.

While the actual correction of the cornea is completed with a laser, the steps leading up to this correction, and subsequently the healing after, will differ depending on the specific procedure the surgeon chooses for the patients’ eyes. The two main procedures most commonly used are LASIK (Laser-Assisted Sin-Situ-Keratomileusis) or PRK (Photorefractive Keratectomy).

LASIK and PRK

Most people have heard of LASIK; however, in some cases, LASIK isn’t the best procedure for them. This can be due to a multitude of reasons, but most often if their cornea is too thin, LASIK will not be advised. This is why visiting an ophthalmologist that performs more than just LASIK is so important. Other procedures, such as PRK, can be recommended and performed to achieve the same, and sometimes even better, results.

The main difference between LASIK and PRK comes during the first step of the process – creating the corneal flap. During LASIK, the surgeon creates flap within the first few layers of the outer surface of the cornea, so that the laser can reach the area that needs to be corrected. This can be done with a microkeratome (a mechanical oscillating blade), or during bladeless LASIK, it can be done with a second laser that separates the outer layer of the cornea. After the primary laser is applied to correct the refractive error, this flap is folded back into place where it bonds readily.

PRK, which is usually performed on patients with thin corneas, removes the surface layer of cells on the cornea. This is why it is often referred to as a surface treatment. After treatment, the body will regenerate new cells to replace the cells removed through a relatively quick healing process. The results of PRK are equal to that of LASIK though the healing times are slightly longer.

Visiting a Qualified Ophthalmologist

Performing LASIK on a patient that is better suited for a procedure like PRK will increase the likelihood of potential risks, such as poor night vision or less than optimal results. To decrease these risks, visit a board-certified ophthalmologist who is skilled at multiple vision correction procedures. This will ensure you the best possible chances to achieve the vision results you are seeking.