Advanced Surface Treatment (Epi-LASIK)
Epi-LASIK, combines some features of LASIK and PRK. It has been performed since 2000.
During Epi-LASIK procedure, the surface layer of the cornea, the epithelium, is smoothly separated from the rest of the cornea using a blunt instrument called a epikeratome.
LASIK, in contrast, cuts a deeper flap in the cornea using a sharp microkeratome blade.
Guided by the wavefront map, the laser reshapes the surface of the cornea to improve vision.
The epithelial flap is then replaced and covered with a protective contact lens for 4-7 days while the epithelium heals after which the contact lens is removed.