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Proceedings Paper

Comparison of retinal damage thresholds of laser pulses in the macula/paramacula regions of the live eye
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Paper Abstract

Single pulses in the near-infrared (800 nanometers) were used to measure retinal minimum visible lesion (MVL) thresholds in rhesus monkey eyes at a pulse width of 130 femtoseconds (fs) within both the macula and paramacula regions. We report the MVL thresholds, determined at 1 hour and 24 hours post exposure, which were obtained within the macula and adjacent paramacula. This data will provide a direct comparison of the sensitivities of different retinal areas to laser injury and provide additional insight to laser damage. These new data points will be added to the databank for MVLs for single pulses. The MVL-ED50 threshold for the macula was measured to be 0.35 (mu) J at 24 hours postexposure, which compares with 0.43 (mu) J measured at 580 nm and the 0.17 (mu) J measured at 532 nm in our laboratory. Our measurements show that the retinal ED50 threshold in the paramacula was larger by a factor of 1.6 than in the macula. This factor of 1.6 is in good agreement with the factor of 1.1 to 2.5 reported in previous studies.

Paper Details

Date Published: 14 June 1999
PDF: 4 pages
Proc. SPIE 3601, Laser-Tissue Interaction X: Photochemical, Photothermal, and Photomechanical, (14 June 1999); doi: 10.1117/12.350036
Show Author Affiliations
Gary D. Noojin, Litton TASC (United States)
Clarence P. Cain, Litton TASC (United States)
Cynthia A. Toth, Duke Univ. Eye Ctr. (United States)
David J. Stolarski, Litton TASC (United States)
Benjamin A. Rockwell, Air Force Research Lab. (United States)


Published in SPIE Proceedings Vol. 3601:
Laser-Tissue Interaction X: Photochemical, Photothermal, and Photomechanical
Steven L. Jacques; David H. Sliney; Gerhard J. Mueller; Gerhard J. Mueller; Andre Roggan; Andre Roggan; David H. Sliney, Editor(s)

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