Excimer laser keratoplasty. Part 2: Elliptical keratoplasty.
An excimer laser at 193 nm was used with a new "open mask system" to perform elliptical noncontact and nonthermal keratoplasties and corneal grafts in human cadaver eyes (Part 1 of this article, Ophthalmic Surg 1989; 20:262-267). By light microscopy the corneas showed sharp, unbeveled cut margins with nearly perfect apposition of the inner wound aspects. An elliptical shape may be better than a circular one, since the former closely approximates the cornea's normal elliptical outline, making it easier to fit corresponding areas of corneal graft to bed. Also, it provides a wider area of Bowman's membrane for anchoring sutures and relatively less volume of donor antigenic tissue.
Lang
G K
GK
Department of Ophthalmology, University of Erlangen-Nuernberg, West Germany.
Schroeder
E
E
Koch
J W
JW
Yanoff
M
M
Naumann
G O
GO
D002102:Cadaver; D003315:Cornea / Q000033:anatomy & histology; D016039:Corneal Transplantation; D004728:Endothelium, Corneal / Q000166:cytology; D006801:Humans; D053685:Laser Therapy; D013537:Sutures