Method for corneal laser surgery

Details Method for corneal laser surgery Method for corneal laser surgery

A - Human Necessities

61

F

A61F 9/007 (2006.01) A61F 9/011 (2006.01)

Patent

CA 2266044

A method for corneal laser surgery includes directing the focal point of a focused laser beam at a start point in the stroma. The focal point is then moved along a predetermined path (92) in the cornea to photo disrupt tissue, and to create a flap or a plug of corneal tissue. Specifically, the flap or plug (72) is crated with an undercut region (74) that interlocks with an overlay region (76) to restrain movement of the flap or plug in an anterior direction. Stromal tissue under the flap or plug can then be, removed (36) when the plug or flap is forcibly lifted from the cornea. The flap or plug is subsequently replaced in its interlocking relationship with the remainder of the cornea tissue. The diminished stromal tissue reshapes the cornea in a manner which improves the vision of the patient.

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