dr. william boothe

Photorefractive Keratectomy or PRK and Radial Keratotomy or RK are different refractile surgical operations employed to remold the cornea. In Radial Keratotomy, an extremely sharp-worded knife is employed to cut incisions in the cornea modifying its shape. Photorefractive Keratectomy represented the first surgical operation formulated to remold the cornea, by sculpting, employing an optical maser. Afterwards, LASIK was formulated.

The same type of optical maser is employed for LASIK and PRK. Frequently the precise same optical maser is employed for the two cases of surgical operation. The leading difference between the two surgical operations is the method that the stroma, the central stratum of the cornea, is exhibited before it's volatilized with the optical maser. In Photorefractive Keratectomy, the top stratum of the cornea, named the epithelial tissue, is scratched aside to reveal the stromal stratum underneath. In LASIK, a flap is chime in the stromal stratum and the flap is closed back.

Another case of refractile surgical operation is thermokeratoplasty in which heat is employed to remold the cornea. The origin of the heat may be an optical maser, but it is another sort of optical maser than is utilised for LASIK and PRK. Different refractile medical devices include corneal ring sections that are introduced into the stroma and particular contacts that temporarily remold the cornea (orthokeratology).