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Proceedings Paper

Ocular hazards of Q-switched blue wavelength 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 14 wavelengths from 410 nm to 580 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 injuiy threshold was 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 h-radiance diameter resulting from chromatic aberration of the eye optics. The threshold for 24hour observation was only slightly lower than the threshold for 1-hour observation. The laser-induced retinal hemorrhage threshold was less than a factor of two greater than the minimum visible lesion (MVL) threshold for wavelengths from 442 nm to 410 nm. This results from the presence ofa dense capillary network in the inner retina and a large hemoglobin absorption peak.

Paper Details

Date Published: 17 May 2001
PDF: 10 pages
Proc. SPIE 4246, Laser and Noncoherent Light Ocular Effects: Epidemiology, Prevention, and Treatment, (17 May 2001); doi: 10.1117/12.426722
Show Author Affiliations
David J. Lund, Walter Reed Army Institute of Research (United States)
Peter R. Edsall, TASC, Inc. (United States)
Bruce E. Stuck, Walter Reed Army Institute of Research (United States)


Published in SPIE Proceedings Vol. 4246:
Laser and Noncoherent Light Ocular Effects: Epidemiology, Prevention, and Treatment
Bruce E. Stuck; Michael Belkin, Editor(s)

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