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9 December 2004 Investigation of ultrashort pulse laser ablation of the cornea and hydrogels for eye microsurgery
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In 1985, the discovery of chirped-pulse amplification (CPA) by G. Mourou and D. Strickland led to ultrashort and high energy pulse lasers. Since energy deposition of ultrashort pulses occurs with limited heat transfer and damages, potential applications of femtosecond lasers to corneal surgery are very promising. By focusing a femtosecond laser on a solid surface, matter is ablated and this process is strongly laser parameter dependent. The goal of the experiment presented here was to measure the femtosecond laser ablation thresholds for different corneal layers and hydrogels. Experiments have been realized with the INRS Ti:Sapphire laser (60fs-400ps, 800nm, 10Hz) and they constitute an initial step toward the development of a new type of high precision surgical tool for corneal microsurgery. Results will be compared to theoretical calculation for light-tissue interaction and propagation using the hydrodynamic code developed at INRS. Grant Identification: NSERC, FRSQ Research in Vision Network and China Scholarship 22836034.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Guillaume Girard, Sheng Zhou M.D., Nicolas Bigaouette, Isabelle Brunette M.D., Mohamed Chaker, Lucie Germain, Pierre-Luc Lavertu, Francois Martin, Gilles Olivie, Tsuneyuki Ozaki, Mireille Parent, Francois Vidal, and Jean-Claude Kieffer "Investigation of ultrashort pulse laser ablation of the cornea and hydrogels for eye microsurgery", Proc. SPIE 5578, Photonics North 2004: Photonic Applications in Astronomy, Biomedicine, Imaging, Materials Processing, and Education, (9 December 2004);

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