LASEK and EpiEpiLasik are laser refractive surgical procedures that alters the shape of the cornea by lasering its surface, without the creation of the cornea flap (surface ablation). It is an alternative to LASIK surgery for patients with thin corneas or who are unsuitable for LASIK.

It is superior to the traditional laser surface ablation, Photorefractive Keratectomy (PRK), where the cornea surface layer (the epithelium) is scraped off with a blade or brush. For LASEK or EpiLASIK, the epithelium is cleaved from the underlying tissue in a more precise and controlled manner.

LASEK and EpiLasik are associated with a faster visual recovery, less discomfort and less incidence of haze compared to PRK.