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Abstract
Abstract
Lamellar Femtosecond Laser Keratoplasty with Conical Incisions and Positional Pikes
Voßmerbäumer U., Jonas J. B.
Dept. of Ophthalmology, Faculty for clinical medicine Mannheim, University of Heidelberg
Purpose: Experimental study to report on lamellar femtosecond laser keratoplasty with conical incisions and positional pikes.
Method: Using a femtosecond laser, an intrastromal corneal incision running parallel to the corneal surface was created in five postmortem eyes of slaughter house pigs. In a second step, a circular conical posterior-anterior incision was performed extending from the peripheral edge of the first incision with a diameter of 8 mm to the corneal surface with a diameter of 7 mm. Additionally, four positional pikes were formed in the graft with corresponding notches in the surrounding tissue.
Results: For all eyes included in the study, the lamellar corneal buttons with the four positional pikes could be prepared and transplanted into the recipient beds of other eyes without major difficulties. The preparation of the lamellar buttons took less than 5 minutes in all cases.
Conclusions: Femtosecond laser technology allows the preparation of lamellar corneal grafts with conical incisions and positional pikes which may decrease postoperative astigmatism and increase postoperative stability of the graft.