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Proceedings Paper

Qualitative optical-thermal model of argon, selective, and microsecond infrared laser trabeculoplasty
Author(s): Fabrice Manns; Jean-Marie A. Parel; Viviana Fernandez; Joseph Stoiber; Peggy D. Lamar; Nelson Salas; Francisco Fantes
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Paper Abstract

Purpose: The purpose of this work was to develop a model to predict and compare laser-trabecular meshwork interactions during laser trabeculoplasty with three different lasers. Methods: A qualitative multilayer optical-thermal model of the trabecular meshwork was developed. The model was used to estimate the penetration depth and heat diffusion volume during laser trabeculoplasty with a continuous wave argon laser (ALT), a Q-switched frequency-doubled Nd:YAG laser (SLT), and a flashlamp-pumped near-infrared alexandrite or titanium sapphire laser emitting microsecond pulses (μs-IRLT). Results: The model predicts that both SLT and μs-IRLT produce selective heating of pigmented trabecular meshwork cells with negligible heat diffusion to surrounding structures and with a deeper penetration at the IR wavelength. A preliminary quantitative analysis indicates that selective targeting of spherical pigments is achieved as long as the pulse duration remains less than approximately 1μs. Conclusion: The qualitative model indicates that infrared laser trabeculoplasty with microsecond pulses can produce selective targeting of pigemented trabecular meshwork cells with a deeper penetration than SLT.

Paper Details

Date Published: 14 July 2003
PDF: 6 pages
Proc. SPIE 4951, Ophthalmic Technologies XIII, (14 July 2003); doi: 10.1117/12.482372
Show Author Affiliations
Fabrice Manns, Bascom Palmer Eye Institute, Univ. of Miami (United States)
Univ. of Miami (United States)
Jean-Marie A. Parel, Bascom Palmer Eye Institute, Univ. of Miami (United States)
Univ. of Miami (United States)
Univ. de Liege CHU Sart-Tilman (Belgium)
Viviana Fernandez, Bascom Palmer Eye Institute, Univ. of Miami (United States)
Joseph Stoiber, Bascom Palmer Eye Institute, Univ. of Miami (United States)
Peggy D. Lamar, Bascom Palmer Eye Institute, Univ. of Miami (United States)
Nelson Salas, Bascom Palmer Eye Institute, Univ. of Miami (United States)
Univ. of Miami (United States)
Francisco Fantes, Bascom Palmer Eye Institute, Univ. of Miami (United States)


Published in SPIE Proceedings Vol. 4951:
Ophthalmic Technologies XIII
Fabrice Manns; Per G. Söderberg; Arthur Ho, Editor(s)

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