New developments in corneal refractive surgery with femtosecond laser pulses

Ronan Le Harzic; Sven Martin; Rainer Bückle; Christian Wüllner; Christof Donitzky; Iris Riemann; Karsten König

doi:10.1117/12.645802

7 March 2006 New developments in corneal refractive surgery with femtosecond laser pulses

Ronan Le Harzic, Sven Martin, Rainer Bückle, Christian Wüllner, Christof Donitzky, Iris Riemann, Karsten König

Proceedings Volume 6138, Ophthalmic Technologies XVI; 61381J (2006) https://doi.org/10.1117/12.645802
Event: SPIE BiOS, 2006, San Jose, California, United States

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.

Citation Download Citation

Ronan Le Harzic, Sven Martin, Rainer Bückle, Christian Wüllner, Christof Donitzky, Iris Riemann, and Karsten König "New developments in corneal refractive surgery with femtosecond laser pulses", Proc. SPIE 6138, Ophthalmic Technologies XVI, 61381J (7 March 2006); https://doi.org/10.1117/12.645802

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