PRK (surface ablation)

PRK (surface ablation) (since 1993)
 

PRK was the first laser technique used to correct vision. This technique is handy when Lasik is not recommended. Laser surface ablation is regaining popularity with ophthalmologists, particularly in cases of eye dryness or abnormal cornea. When lasik cannot be performed safely, we then turn to PRK.

For the last few years, the quality of the surface following an Excimer laser treatment has allowed to obtain similar results without increasing the risks.

In cases of higher myopia, the addition of a medication at a low concentration (Mitomycine C) during thirty or so seconds literally eliminates risks of haze. The same procedure can be used in complex re-treatment cases, such as:

cornea too thin
abnormal topography
high myopia
epithelial abnormalities or surface irregularities
haze
 

First, the surgeon brushes the surface of the cornea and then, applies the laser treatment. We operate both eyes at the same time.

After surgery, the patient will wear a bandage contact lens for at least 48 to 72 hours in order to reduce the postoperative discomfort and the use of cortisone drops will be necessary for a few months. The visual acuity might be difficult during the first week following the surgery.

Results are similar for both Lasik and PRK.

Side effects (Lasik, PRK)
A surgery is a surgery! Side effects may occur and complications are always a risk… but they are rare.

During the first 2 to 4 hours following the surgery, you may feel some discomfort and some pain (may vary from one person to an other and according to the type of surgery) which can be efficiently reduced with analgesics.
Your eyes may be more sensitive to intense light during the stabilization period (from one to three months).*
You may see halos or starts around lights at night following a laser treatment.*
Vision may fluctuate during the day until complete stabilization (in average, 3 months after surgery).*
Regression (tendency of the eye to bounce back toward its original shape) may happen during the stabilization period and is related to the individual healing of the eyes. An enhancement procedure may be considered after the 6 months if the surgeon thinks it is appropriate.
Cases of infection are rare : around 1/7,500.
Night vision may diminished.
Following the surgery, your vision could be worse than the one you had with your best glasses before the procedure (<1%). *
Some patients may require glasses for some activities, like driving at night (<2%).
 

* These symptoms may be permanent for some patients.