Design improvement in keratoprosthesis

Franck L. Villain; Emmanuel Lacombe M.D.; Jean-Marc Legeais M.D.; Gilles Bos; Pascal O. Rol; Jean-Marie A. Parel

doi:10.1117/12.178570

23 June 1994 Design improvement in keratoprosthesis

Franck L. Villain, Emmanuel Lacombe M.D., Jean-Marc Legeais M.D., Gilles Bos, Pascal O. Rol, Jean-Marie A. Parel

Proceedings Volume 2126, Ophthalmic Technologies IV; (1994) https://doi.org/10.1117/12.178570
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

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.

Citation Download Citation

Franck L. Villain, Emmanuel Lacombe M.D., Jean-Marc Legeais M.D., Gilles Bos, Pascal O. Rol, and Jean-Marie A. Parel "Design improvement in keratoprosthesis", Proc. SPIE 2126, Ophthalmic Technologies IV, (23 June 1994); https://doi.org/10.1117/12.178570

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