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Proceedings Paper

Laser-induced retinal injury studies with wavefront correction
Author(s): Brian J. Lund; David J. Lund; Peter R. Edsall
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Paper Abstract

The ability of a laser beam to damage the retina of the eye depends on the accuracy to which the optics of the eye focuses the beam onto the retina. Data acquired through retinal injury threshold studies indicate that the focus achieved by the eye of an anesthetized non-human primate (NHP) is worse than theoretical predictions, and therefore the measured injury threshold will decrease with decreasing retinal irradiance area until the beam diameter at the retina is less than 10 &mgr;m. However, a number of investigations over a range of wavelengths and exposure durations show that the incident energy required to produce a retinal injury in a NHP eye does not decrease for retinal irradiance diameters smaller than ~100 &mgr;m, but reaches a minimum at that diameter and remains nearly constant for smaller diameters. A possible explanation is that uncompensated aberrations of the eye of the anesthetized NHP are larger than predicted. Focus is a dynamic process which is purposely defeated while performing measurements of retinal injury thresholds. Optical wavefront correction systems have become available which have the capability to compensate for ocular aberrations. This paper will report on an injury threshold experiment which incorporates an adaptive optics system to compensate for the aberrations of a NHP eye during exposure to a collimated laser beam, therefore producing a near diffraction limited beam spot on the retina.

Paper Details

Date Published: 26 March 2007
PDF: 9 pages
Proc. SPIE 6426, Ophthalmic Technologies XVII, 642627 (26 March 2007); doi: 10.1117/12.710993
Show Author Affiliations
Brian J. Lund, Northrop Grumman (United States)
David J. Lund, U.S. Army Medical Research Detachment, Walter Reed Army Institute of Research (United States)
Peter R. Edsall, U.S. Army Medical Research Detachment, Walter Reed Army Institute of Research (United States)

Published in SPIE Proceedings Vol. 6426:
Ophthalmic Technologies XVII
Bruce E. Stuck; Fabrice Manns; Per G. Söderberg; Michael Belkin M.D.; Arthur Ho, Editor(s)

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