ArF photorefractive correction of keratoprostheses

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

doi:10.1117/12.147548

24 June 1993 ArF photorefractive correction of keratoprostheses

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

Proceedings Volume 1877, Ophthalmic Technologies III; (1993) https://doi.org/10.1117/12.147548
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

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.

Citation Download Citation

Pascal O. Rol, Jean-Marie A. Parel, Emmanuel Lacombe M.D., Jean-Marc Legeais M.D., and Franck L. Villain "ArF photorefractive correction of keratoprostheses", Proc. SPIE 1877, Ophthalmic Technologies III, (24 June 1993); https://doi.org/10.1117/12.147548

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