Laser-induced retinal damage threshold as a function of retinal image size

Joseph A. Zuclich; David J. Lund; Peter R. Edsall; Richard C. Hollins; Peter Alan Smith; Bruce E. Stuck; Leon N. McLin

doi:10.1117/12.350594

18 June 1999 Laser-induced retinal damage threshold as a function of retinal image size

Joseph A. Zuclich, David J. Lund, Peter R. Edsall, Richard C. Hollins, Peter Alan Smith, Bruce E. Stuck, Leon N. McLin

Proceedings Volume 3591, Ophthalmic Technologies IX; (1999) https://doi.org/10.1117/12.350594
Event: BiOS '99 International Biomedical Optics Symposium, 1999, San Jose, CA, United States

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.

Citation Download Citation

Joseph A. Zuclich, David J. Lund, Peter R. Edsall, Richard C. Hollins, Peter Alan Smith, Bruce E. Stuck, and Leon N. McLin "Laser-induced retinal damage threshold as a function of retinal image size", Proc. SPIE 3591, Ophthalmic Technologies IX, (18 June 1999); https://doi.org/10.1117/12.350594

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