Laser-induced retinal injury studies with wavefront correction

Brian J. Lund; David J. Lund; Peter R. Edsall

doi:10.1117/12.710993

26 March 2007 Laser-induced retinal injury studies with wavefront correction

Brian J. Lund, David J. Lund, Peter R. Edsall

Proceedings Volume 6426, Ophthalmic Technologies XVII; 642627 (2007) https://doi.org/10.1117/12.710993
Event: SPIE BiOS, 2007, San Jose, California, United States

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.

Citation Download Citation

Brian J. Lund, David J. Lund, and Peter R. Edsall "Laser-induced retinal injury studies with wavefront correction", Proc. SPIE 6426, Ophthalmic Technologies XVII, 642627 (26 March 2007); https://doi.org/10.1117/12.710993

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