LASIK is a surgical procedure intended to reduce a person’s dependency on glasses or contact lenses.
LASIK stands for Laser-Assisted In Situ Keratomileusis and is a procedure that permanently changes the shape of the cornea, the clear covering of the front of the eye, using a laser.
PRK stands for Photorefractive Keratectomy, which is similar to LASIK, however a flap is not created in PRK and the epithelial covering of the cornea is gentle removed prior to the excimer laser application.
A microkeratome or a femtosecond laser is used to create a hinged flap in the cornea in LASIK.
The flap is folded back revealing the stroma, the midsection of the cornea.
Pulses from a computer-controlled excimer laser vaporize a portion of the stroma and the flap is replaced. This changes the refractive power of the cornea, giving you better vision without glasses.
There are other techniques and many new terms related to LASIK that you may hear about.