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Proceedings Paper

Ocular hazards of Q-switched near-infrared lasers
Author(s): David J. Lund; Peter R. Edsall; Bruce E. Stuck
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Paper Abstract

The threshold for laser-induced retinal damage in the rhesus eye was determined for wavelengths between 900 nm and 1300 nm. The laser source was a tunable Optical Parametric Oscillator (OPO) pumped by the 3rd harmonic of a Nd:YAG laser. The laser pulse duration was 3.5 ns. The wavelength dependence of the injury threshold is consistent with the prediction of a model based on the transmission of the preretinal ocular media, absorption in the retinal pigment epithelium, and variation of irradiance diameter resulting from chromatic aberration of the eye optics for wavelengths shorter than 1150 nm but was less consistent for longer wavelengths. The threshold for 24-hour observation was slightly lower than the threshold for 1-hour observation. These data form a basis for reexamination of the currently defined MPEs for wavelengths longer than 1100 nm.

Paper Details

Date Published: 20 June 2003
PDF: 6 pages
Proc. SPIE 4953, Laser and Noncoherent Light Ocular Effects: Epidemiology, Prevention, and Treatment III, (20 June 2003); doi: 10.1117/12.488646
Show Author Affiliations
David J. Lund, Walter Reed Army Institute of Research (United States)
Peter R. Edsall, Northrop Grumman IT (United States)
Bruce E. Stuck, Walter Reed Army Institute of Research (United States)


Published in SPIE Proceedings Vol. 4953:
Laser and Noncoherent Light Ocular Effects: Epidemiology, Prevention, and Treatment III
Bruce E. Stuck; Michael Belkin, Editor(s)

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