LASEK – or Laser Epithelial Keratomileusis – is a refractive eye surgery that combines the benefits of LASIK and PRK. LASEK can be used to treat astigmatism, nearsightedness, and farsightedness.
Similar to other forms of refractive surgery, LASEK uses an excimer laser to reshape the cornea in order to allow light entering the eye to be properly focused onto the retina. During surgery, the epithelium is treated with mild medical alcohol to detach it from the underlying tissue. The epithelial layer is then lifted back and the newly exposed tissue is re-shaped with the laser. Once the procedure is complete, the epithelium is placed back over the cornea.