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Proceedings Paper

New developments in corneal refractive surgery with femtosecond laser pulses
Author(s): Ronan Le Harzic; Sven Martin; Rainer Bückle; Christian Wüllner; Christof Donitzky; Iris Riemann; Karsten König
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Paper Abstract

Influence of laser parameters are studied and discussed in this paper dealing with safety aspects of femtosecond laser refractive surgery. Studies on transmission and energy have been done using different focusing objectives. More than 20% of NIR photons are reaching the retina using a numerical aperture of 0.3 which represent a fluence of 2 μJ/cm2 with parameters for flap procedure of about 7 μJ energy per pulse, at 10 KHz repetition rate and at a wavelength of 1040 nm. When using an objective with NA 0.9 about one order less fluence will strike the retina. To minimize bubbles expansion and side effects in tissue processing as well as to exclude any damages at retina, a compromise between ablation time, pulse energy and process strategy by the use of higher numerical aperture has to be taken into account.

Paper Details

Date Published: 7 March 2006
PDF: 10 pages
Proc. SPIE 6138, Ophthalmic Technologies XVI, 61381J (7 March 2006); doi: 10.1117/12.645802
Show Author Affiliations
Ronan Le Harzic, Fraunhofer Institute of Biomedical Technology (Germany)
JenLab GmbH (Germany)
Sven Martin, JenLab GmbH (Germany)
Rainer Bückle, JenLab GmbH (Germany)
Christian Wüllner, Wavelight Laser Technologie AG (Germany)
Christof Donitzky, Wavelight Laser Technologie AG (Germany)
Iris Riemann, Fraunhofer Institute of Biomedical Technology (Germany)
Karsten König, Fraunhofer Institute of Biomedical Technology (Germany)
Univ. of Saarland (Germany)

Published in SPIE Proceedings Vol. 6138:
Ophthalmic Technologies XVI
Fabrice Manns; Per G. Söderberg; Arthur Ho, Editor(s)

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