PRK stands for photorefractive keratectomy, a procedure that is used for correcting both nearsightedness and farsightedness. This is one of the most important developments in eye care surgeries because it offered a chance to improve refractive error of the eye without prescription eyeglasses or contact lenses.
PRK is considered the pioneer surgery for correcting vision deficiencies. It was invented in 1987. Over years, the procedure has been perfected through the efforts of the contributions of researchers from all over the world.
Although PRK was introduced almost several decades ago, it is still recommended for patients in specific circumstances. Even the presence of procedures such as LASIK and LASEK has not diminished the importance of the procedure. The time period of the operation is almost similar to LASIK (about twenty minutes per eye)
The procedure corrects the shape of cornea by providing access to the inner layers of the cornea. These layers are then sculpted by using laser. The upper layer of the eye known as epithelial layer is removed completely at the start of the operation.
One of the major issues in PRK is the relatively long recovery period. This is one reason why LASIK has become the dominant vision correcting surgery. In the beginning of PRK procedure, the upper layer of cornea is removed. Because of this, the initial recovery period from PRK is long because the cells need time to grow and cover the entire surface once again. The recovery period could stretch out in weeks depending upon the rate of cell growth and the healing of the wound.