Photorefractive Keratectomy (PRK) was the first laser vision correction surgery method approved by the FDA in 1995. As with all laser refractive surgeries, vision correction is achieved by changing the shape of the cornea.
While proven safe, PRK is now mostly replaced by other refractive procedures such as LASIK, SMILE, and ICL. However, it is still the preferred method of vision correction for certain military branches and can be a good option for people with a low prescription. Finally, PRK is sometimes performed as a follow-up surgery to LASIK done many years ago.