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Proceedings Paper

Variation of retinal ED50 with exposure duration for near-IR sources
Author(s): David J. Lund; Daniel R. Fuller; Stephen W. Hoxie; P.R. Edsall
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Paper Abstract

A body of data relates the ED50 for laser-induced retinal damage to exposure duration for visible-wavelength laser exposure and for 1064 nm laser exposure. The database, extending from sub-nanosecond exposures to kilosecond exposures, can for the most part, be fit to models based on thermal interactions, thermal-mechanical mechanisms, and photochemical processes. Exceptions to this fit occur between 1 and 100 microseconds where the damage mechanism transitions from exclusively thermal to thermal-mechanical. Disagreement exists as to whether this anomalous dip of ED50 is real or is an artifact of the data. We determined the laser-induced retinal ED50 in Rhesus monkey eyes for several exposure durations from 12 nanoseconds to 1000 milliseconds at 755 nm using a dye laser, an alexandrite laser, and a Ti:Sapphire laser. These data do not show a dip in ED50 in the microsecond time period.

Paper Details

Date Published: 2 May 1997
PDF: 9 pages
Proc. SPIE 2974, Laser and Noncoherent Ocular Effects: Epidemiology, Prevention, and Treatment, (2 May 1997); doi: 10.1117/12.275254
Show Author Affiliations
David J. Lund, Walter Reed Army Institute of Research (United States)
Daniel R. Fuller, Walter Reed Army Institute of Research (United States)
Stephen W. Hoxie, Walter Reed Army Institute of Research (United States)
P.R. Edsall, Walter Reed Army Institute of Research (United States)


Published in SPIE Proceedings Vol. 2974:
Laser and Noncoherent Ocular Effects: Epidemiology, Prevention, and Treatment
Bruce E. Stuck; Michael Belkin, Editor(s)

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