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Normal anatomy: The cornea is the transparent part of the eye that covers the iris. It is also the main light bending part of the eye. 
Procedure, part 1: Anesthetic eye drops are given to numb the eye and the surgeon marks the cornea with water-soluble ink to guide replacement of the corneal flap. 
Procedure, part 2: The surgeon performs a keratectomy which creates a corneal flap. A keratectomy is a procedure that uses a small instrument that makes a cut in the cornea as it moves across it. The flap is lifted and reflected exposing the cornea beneath. 
Procedure, part 3: A computer-controlled laser reshapes the cornea to the prescribed shape for clear vision. 
Aftercare: The corneal flap is repositioned and bonds to the cut edge of the cornea quickly. 
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| Review Date: 8/22/2008
Reviewed By: Paul B. Griggs, MD, Department of Ophthalmology, Virginia Mason Medical Center, Seattle, WA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
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