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Proceedings Paper

ArF photorefractive correction of keratoprostheses
Author(s): Pascal O. Rol; Jean-Marie A. Parel; Emmanuel Lacombe M.D.; Jean-Marc Legeais M.D.; Franck L. Villain
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Paper Abstract

Keratoprostheses (KPro) are optical elements replacing a cornea that is opacified and which cannot be replaced by transplantation. This occurs, for example, after severe burn or in trachoma. The KPro that consists of an optical cylinder mounted on a supporting plate (haptics) is implanted approximately in the middle of the cornea. It is intended to restore vision, i.e., should give a sufficient visual acuity and a comfortable field of view. Failures are due to rejection (expulsion) and optical decentration of the prosthesis. Postoperative corrections of the refractive power are possible with spectacles. However, in view of the rapid expansion of corneal reshaping with the ArF excimer laser emitting at 193 nm, a direct correction of the anterior surface of the KPro can be envisaged. For that purpose, various designs are analyzed in terms of image magnification and field of view. The possibility of a postoperative adaptation of the keratoprostheses by photoablation with the ArF is then presented.

Paper Details

Date Published: 24 June 1993
PDF: 4 pages
Proc. SPIE 1877, Ophthalmic Technologies III, (24 June 1993); doi: 10.1117/12.147548
Show Author Affiliations
Pascal O. Rol, ETH and Univ of Zurich (Switzerland), and Univ. of Miami College of Engineering (United States)
Jean-Marie A. Parel, Bascom Palmer Eye Institute/Univ. of Miami School of Medicine (United States)
Univ. of Miami College of Engineering (United States)
Emmanuel Lacombe M.D., Hopital Leopold Belland (France)
Jean-Marc Legeais M.D., Clinique Ophtalmologique (France)
Franck L. Villain, Bascom Palmer Eye Institute/Univ. of Miami School of Medicine (United States)

Published in SPIE Proceedings Vol. 1877:
Ophthalmic Technologies III
Jean-Marie A. Parel; Qiushi Ren, Editor(s)

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