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Proceedings Paper

Human cadaver retina model for retinal heating during corneal surgery with a femtosecond laser
Author(s): Hui Sun; Zhongwei Fan; Jin Yun; Tianzhuo Zhao; Ying Yan; Ron M. Kurtz; Tibor Juhasz
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Paper Abstract

Femtosecond lasers are widely used in everyday clinical procedures to perform minimally invasive corneal refractive surgery. The intralase femtosecond laser (AMO Corp. Santa Ana, CA) is a common example of such a laser. In the present study a numerical simulation was developed to quantify the temperature rise in the retina during femtosecond intracorneal surgery. Also, ex-vivo retinal heating due to laser irradiation was measured with an infrared thermal camera (Fluke Corp. Everett, WA) as a validation of the simulation. A computer simulation was developed using Comsol Multiphysics to calculate the temperature rise in the cadaver retina during femtosecond laser corneal surgery. The simulation showed a temperature rise of less than 0.3 degrees for realistic pulse energies for the various repetition rates. Human cadaver retinas were irradiated with a 150 kHz Intralase femtosecond laser and the temperature rise was measured withan infrared thermal camera. Thermal camera measurements are in agreement with the simulation. During routine femtosecond laser corneal surgery with normal clinical parameters, the temperature rise is well beneath the threshold for retina damage. The simulation predictions are in agreement with thermal measurements providing a level of experimental validation.

Paper Details

Date Published: 26 February 2014
PDF: 11 pages
Proc. SPIE 8941, Optical Interactions with Tissue and Cells XXV; and Terahertz for Biomedical Applications, 89410G (26 February 2014); doi: 10.1117/12.2036051
Show Author Affiliations
Hui Sun, Academy of Opto-Electronics (China)
Zhongwei Fan, Academy of Opto-Electronics (China)
Jin Yun, Academy of Opto-Electronics (China)
Tianzhuo Zhao, Academy of Opto-Electronics (China)
Ying Yan, Academy of Opto-Electronics (China)
Ron M. Kurtz, Univ. of California, Irvine (United States)
Tibor Juhasz, Univ. of California, Irvine (United States)

Published in SPIE Proceedings Vol. 8941:
Optical Interactions with Tissue and Cells XXV; and Terahertz for Biomedical Applications
E. Duco Jansen; Gerald J. Wilmink; Bennett L. Ibey; Robert J. Thomas, Editor(s)

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