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Proceedings Paper

Femtosecond refractive eye surgery: study of laser parameters for even more efficiency and safety
Author(s): Ronan Le Harzic; Christian Wüllner; D. Bruneel; Christof Donitzky; Karsten König
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Paper Abstract

Studies on corneal surgery and flap processing on enucleated porcine eyes have been performed using a dedicated 100 kHz femtosecond laser source based on Ytterbium technology. IR (1035 nm) and green (517 nm) flap processing have been studied. Comparisons for ocular femtosecond laser surgery are discussed in terms of process efficiency and safety aspects. Flaps with a typical diameter of 6 mm and 150 μm thick have been performed in less than 2 min with both wavelengths. The transmittances of femtosecond laser pulses through the ocular media of porcine eyes have been measured for a collimated beam and during flap processing. More than 25% of energy is transmitted through the whole eye at the retina during IR pulses flap processing. Concerning green pulses, if less energy is necessary to perform the flap which is of prime interest, the transmission of green light is very high and could be an undeniable obstacle for the safety.

Paper Details

Date Published: 13 July 2007
PDF: 8 pages
Proc. SPIE 6632, Therapeutic Laser Applications and Laser-Tissue Interactions III, 663217 (13 July 2007); doi: 10.1117/12.728098
Show Author Affiliations
Ronan Le Harzic, Fraunhofer Institute of Biomedical Technology (Germany)
JenLab GmbH (Germany)
Christian Wüllner, Wavelight Laser Technologie AG (Germany)
D. Bruneel, Fraunhofer Institute of Biomedical Technology (Germany)
Christof Donitzky, Wavelight Laser Technologie AG (Germany)
Karsten König, Fraunhofer Institute of Biomedical Technology (Germany)
Univ. of the Saarland (Germany)

Published in SPIE Proceedings Vol. 6632:
Therapeutic Laser Applications and Laser-Tissue Interactions III
Alfred Vogel, Editor(s)

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