In some cases, patients are considered to be candidates for laser refractive surgery but they have certain characteristics that are discovered in their eyes during the examination which indicate that PRK might be an equally good or perhaps even a better choice. PRK was the original laser refractive surgery and at one time was the most common available. It was introduced in the 1980's and even today it continues to demonstrate a high level of safety and effectiveness. PRK became less common by the end of the 1990's with the introduction of LASIK. Despite LASIK's shortened recovery time, PRK remains an option with its own set of advantages and may at times be suggested instead of LASIK. Unlike LASIK, a flap is not created during PRK. Instead, the cornea is treated directly with the excimer laser, altering its shape to provide the needed prescription.The surgeon will consider PRK in the following cases: Patient has less than 8.00 D of near-sightedness but with a thin cornea A history of recurrent corneal erosion or corneal basement membrane dystrophy A history of dry eye that is difficult to treat Career opportunities, such as becoming a pilot A history of glaucoma, in which case a glaucoma specialist will be consulted
