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Proceedings Paper

Design improvement in keratoprosthesis
Author(s): Franck L. Villain; Emmanuel Lacombe; Jean-Marc Legeais; Gilles Bos; Pascal O. Rol; Jean-Marie A. Parel
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Paper Abstract

One of the major problems of keratoprosthesis (KPro) is postoperative expulsion resulting from inadequate haptic fixation. To overcome this obstacle, a new design was conceived using a retrocorneal fixation. An earlier version of our KPro was made of two pieces: an optical element threaded in a surrounding haptic. Both pieces were made of medical grade PMMA. Although encouraging results were obtained, some anatomic failures occurred (20% at 5 years). To improve fixation and sealing, a biocolonizable skirt was recently added to the keratoprosthesis. This skirt should prevent migration of biocontaminants inside the eye. Made of porous PTFE, the skirt was ultrasonically held inside a one-piece PMMA keratoprosthesis by ultrasonic microwelding. Thus far, implantations carried out in 8 patients show a good tolerance.

Paper Details

Date Published: 23 June 1994
PDF: 7 pages
Proc. SPIE 2126, Ophthalmic Technologies IV, (23 June 1994); doi: 10.1117/12.178570
Show Author Affiliations
Franck L. Villain, Corneal SA (France)
Emmanuel Lacombe, Hopital Leopold Bellan (France)
Jean-Marc Legeais, Hopital de L'Hotel-Dieu/Univ. de Paris (France)
Gilles Bos, Corneal SA (France)
Pascal O. Rol, Swiss Federal Institute of Technology and Univ. of Miami College of Engineering (United States)
Jean-Marie A. Parel, Hopital de l'Hotel-Dieu/Univ. de Paris Bascom Palmer Eye Institute/Univ. of Miami School of Medicine (United States)

Published in SPIE Proceedings Vol. 2126:
Ophthalmic Technologies IV
Jean-Marie A. Parel; Qiushi Ren, Editor(s)

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