Photoablation of the cornea with a Q-switched Er:YAG laser

Holger Lubatschowski; U. Hetzel; Omid Kermani; Carsten Ziolek; Wolfgang Drommer; Wolfgang Ertmer

doi:10.1117/12.297839

22 December 1997 Photoablation of the cornea with a Q-switched Er:YAG laser

Holger Lubatschowski, U. Hetzel, Omid Kermani, Carsten Ziolek, Wolfgang Drommer, Wolfgang Ertmer

Proceedings Volume 3192, Medical Applications of Lasers in Dermatology, Ophthalmology, Dentistry, and Endoscopy; (1997) https://doi.org/10.1117/12.297839
Event: BiOS Europe '97, 1997, San Remo, Italy

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.

Citation Download Citation

Holger Lubatschowski, U. Hetzel, Omid Kermani, Carsten Ziolek, Wolfgang Drommer, and Wolfgang Ertmer "Photoablation of the cornea with a Q-switched Er:YAG laser", Proc. SPIE 3192, Medical Applications of Lasers in Dermatology, Ophthalmology, Dentistry, and Endoscopy, (22 December 1997); https://doi.org/10.1117/12.297839

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