26 February 2014 Human cadaver retina model for retinal heating during corneal surgery with a femtosecond laser
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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.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hui Sun, Hui Sun, Zhongwei Fan, Zhongwei Fan, Jin Yun, Jin Yun, Tianzhuo Zhao, Tianzhuo Zhao, Ying Yan, Ying Yan, Ron M. Kurtz, Ron M. Kurtz, Tibor Juhasz, Tibor Juhasz, "Human cadaver retina model for retinal heating during corneal surgery with a femtosecond laser", Proc. SPIE 8941, Optical Interactions with Tissue and Cells XXV; and Terahertz for Biomedical Applications, 89410G (26 February 2014); doi: 10.1117/12.2036051; https://doi.org/10.1117/12.2036051

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