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Proceedings Paper

Laser-induced retinal damage threshold as a function of retinal image size
Author(s): Joseph A. Zuclich; David J. Lund; Peter R. Edsall; Richard C. Hollins; Peter Alan Smith; Bruce E. Stuck; Leon N. McLin
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Paper Abstract

The dependence of retinal damage threshold on laser spot size was examined for two pulsewidth regimes; nanosecond- duration Q-switched pulses from a doubled Nd:YAG laser and microsecond-duration pulses from a flashlamp-pumped dye laser. Threshold determinations were conducted for nominal retinal image sizes ranging from 1.5 mrad to 100 mrad of visual field, corresponding to image diameters of approximately 22 μm to 1.4 mm on the primate retina. In addition, baseline collimated-beam damage thresholds were determined for comparison to the extended source data. Together, this set of retinal damage thresholds reveals the functional dependence of threshold on spot size. The threshold dose was found to vary with the area of the image for larger image sizes. The results are compared to previously published extended source damage thresholds and to the ANSI Z136.1 laser safety standard maximum permissible exposure levels for diffuse reflections.

Paper Details

Date Published: 18 June 1999
PDF: 9 pages
Proc. SPIE 3591, Ophthalmic Technologies IX, (18 June 1999); doi: 10.1117/12.350594
Show Author Affiliations
Joseph A. Zuclich, The Analytical Sciences Corp. (United States)
David J. Lund, Walter Reed Army Institute of Research (United States)
Peter R. Edsall, The Analytical Sciences Corp. (United States)
Richard C. Hollins, Defence Evaluation and Research Agency Malvern (United Kingdom)
Peter Alan Smith, Defence Evaluation and Research Agency Farnborough (United States)
Bruce E. Stuck, Walter Reed Army Institute of Research (United States)
Leon N. McLin, U.S. Air Force (United States)


Published in SPIE Proceedings Vol. 3591:
Ophthalmic Technologies IX
Bruce E. Stuck; Michael Belkin; Pascal O. Rol; Karen Margaret Joos; Fabrice Manns; Bruce E. Stuck; Michael Belkin, Editor(s)

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