Step 1: First, your eye surgeon uses either a mechanical surgical tool called a microkeratome or a femtosecond laser to create a microscopic thin, circular “flap” in the cornea.
The surgeon then folds back the hinged flap to access the underlying cornea (called the stroma) and exposes the middle layer for laser treatment.
Step 2: The surgeon focuses the layer on the middle layer and depresses a foot pedal to activate the laser. The laser is kept activated for a few seconds to a minute depending on the amount of correction needed.
The activated laser makes a rapid ticking sound, each tick representing an individual pulse of laser. After the laser reshapes the cornea, a small amount of fluid is used to wash away microscopic tissue debris. The flap is then folded back into place. In a few minutes natural adhesive forces seal it in place without the need for sutures.