LASEK, or Laser Assisted Subepithelial Keratectomy, is a modification of the LASIK and PRK procedures. After anesthetizing the eye, an alcohol solution is used to loosen the surface layer of cells on the cornea. This layer is lifted and the cornea is treated with the laser. More of the corneal tissue is available for treatment than with LASIK, making LASEK a better choice for patients who require greater vision correction. After treatment the cells are replaced and allowed to heal. A contact lens may be worn for a few days until recovery is complete. Advantages of LASEK over PRK are diminished pain, shorter recovery time and a lower risk of infection.