M. Sandera, *, O. Minetb, U. Zabarylob, M. Müllerc, and M. R. Tetza
a Berlin Eye Research Institute, Alt Moabit 98/99, 10559 Berlin, Germany
b Charité Centrum 6, AG Medizinische Physik/Optische Diagnostik, Fabeckstr. 60–62, 14195 Berlin, Germany
c Augenklinik Ahaus, Am Schlögraben 13, 48683 Ahaus, Germany
*e-mail: Meike_Sander@web.de
Received October 29, 2011; in final form, November 12, 2011; published online March 6, 2012
Abstract—The femtosecond-laser in situ keratomileusis procedure affords the opportunity to correct ametro-
pia by cutting transparent corneal tissue with ultra-short laser pulses. Thereby the tissue cut is generated by a
laser-induced optical breakdown in the cornea with ultra-short laser pulses in the near-infrared range. Com-
pared to standard procedures such as photorefractive keratectomy and laser in-situ keratomileusis with the exci-
mer laser, where the risk potential for the eye is low due to the complete absorption of ultraviolet irradiation
from corneal tissue, only a certain amount of the pulse energy is deposited in the cornea during the fs-LASIK
process. The remaining energy propagates through the eye and interacts with the retina and the strong absorbing
tissue layers behind. The objective of the presented study was to determine and compare the retina damage
thresholds during the fs-LASIK process simulated with two various laser systems in the CW-and fs-regime.
DOI: 10.1134/S1054660X12040172
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