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Proceedings Paper

Photoablation of the cornea with a Q-switched Er:YAG laser
Author(s): Holger Lubatschowski; U. Hetzel; Omid Kermani; Carsten Ziolek; Wolfgang Drommer; Wolfgang Ertmer
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Paper Abstract

In this study the ablation characteristics and the wound healing process of rabbit cornea irradiated with a Q- switched Er:YAG laser was evaluated. The laser, emitting at 2.94 micrometers wavelength, has a pulse width of 100 ns. The spot size on the corneal surface was 1 mm in diameter at a fluence of 750 mJ/cm2. The laser beam was applied by a `flying spot' mode, performing refractive ablations of -7 to -8 dpt. As a biological model, the corneas of 9 rabbits were irradiated. The post-treatment follow-up was as long as 39 days. The treated corneas were investigated by light and electron microscopy. The wound healing on rabbit cornea of the Q-switched Er:YAG laser radiation in corneal tissue processing resembles to what is known from ArF- excimer laser application. To shorten the pulse width by means of Q-switching is one major key to the successful application of the Er:YAG laser for PRK.

Paper Details

Date Published: 22 December 1997
PDF: 5 pages
Proc. SPIE 3192, Medical Applications of Lasers in Dermatology, Ophthalmology, Dentistry, and Endoscopy, (22 December 1997); doi: 10.1117/12.297839
Show Author Affiliations
Holger Lubatschowski, Laserzentrum Hannover e.V. (Germany)
U. Hetzel, Tieraerztliche Hochschule Hannover (Germany)
Omid Kermani, Laserforum GmbH Koeln (Germany)
Carsten Ziolek, Laserzentrum Hannover e.V. (Germany)
Wolfgang Drommer, Tierarztliche Hochschule Hannover (Germany)
Wolfgang Ertmer, Univ. Hannover (Germany)

Published in SPIE Proceedings Vol. 3192:
Medical Applications of Lasers in Dermatology, Ophthalmology, Dentistry, and Endoscopy
Gregory B. Altshuler; Reginald Birngruber; Marco Dal Fante; Raimund Hibst; Herbert Hoenigsmann; Neville Krasner M.D.; Frederic Laffitte, Editor(s)

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