PRK (Photorefractive Keratectomy) is one of the oldest yet among the most effective vision correction treatment on offer. Numerous people in Sydney and other parts of the globe have benefited a great deal through this refractive surgery. This advanced surgery can correct a wide range of vision related problems such as myopia, hypermetropia and astigmatism among others. What might come as a bit surprising for you is the fact that PRK treatment happens to be the first laser eye surgery treatment on offer, which is the reason why it is being termed as the predecessor to the now popular LASIK procedure which millions of people are opting for to restore their normal vision in a painless manner. Although the people who go for PRK treatment take longer to recover or heal when compared to LASIK surgery patients, there are still many reason why people go for the former due to some of the important benefits it offers to patients.
The basic functioning of PRK treatment is very much similar to that LASIK and other laser eye surgeries on offer. Like other laser eye surgeries, it provides results by reshaping the cornea. Anexcimer lasers are used for this procedure. Proper passage of light through the lens of the eye to reach retina is important for clear vision.
One of the major differences between PRK and LASIK treatment is that LASIK createsa very thin and hinged flap on the cornea of the eye to enter and treat the problematic area. PRK, on the other hand, works by removing the epithelial or upper most layer of the cornea so as to expose the area underneath. Also, no such flap is created as is the case with LASIK surgery. The next step of the process is very similar for both the surgeries as they utilize excimer laser to reshape the stromal layer of the cornea to correct certain vision related problems and restore normal eyesight.
Another variation of PRK treatment is also on offer in Sydney and other major cities of the world these days. This variation is called LASEK. In this procedure, epithelial layer of the cornea is lifted instead of being removed as is the case with PRK treatment. A surgical instrument called trephine is used for this purpose. Once the procedure is completed, this layer can then be replaced on the eye’s surface. It has emerged as a better alternative to PRK due to the fact that it requires lesser downtime.