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Proceedings Paper

Investigation of possible fs-LASIK induced retinal damage
Author(s): S. Schumacher; M. Sander; A. Stolte; C. Doepke; W. Baumgaertner; H. Lubatschowski
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Paper Abstract

Rapid development of new laser technologies enabled the application of ultra short lasers in refractive surgery. Focused ultra short laser pulses in near-infrared spectral range can generate a laser induced breakdown (LIB) in the cornea, which will disrupt the tissue. Cutting depth and position can be established by varying the laser focus. The fs-LASIK technique allows both flap and lenticule to be formed by using fs-pulses without the presence of any mechanical impact. During the cutting process not all of the pulse energy is deposited into the cornea; approximately half of the remaining energy propagates through the eye and reaches the retina. Though defocused, the transmitted energy can still induce damage to the retina due to absorption by the retinal pigment epithelium and the transfer of thermal energy to surrounding tissue. The fs-LASIK process was simulated with two laser systems; one continous-wave and one in the fs-regime. For the simulation the exposure time and focusing numerical aperature which defines the retinal spot size were varied. The Damage thresholds of the laser beam exposed eyes were determined in terms of ophthalmoscopic and histopathologic observations.

Paper Details

Date Published: 7 March 2006
PDF: 9 pages
Proc. SPIE 6138, Ophthalmic Technologies XVI, 61381I (7 March 2006); doi: 10.1117/12.645147
Show Author Affiliations
S. Schumacher, Laser Zentrum Hannover e.V. (Germany)
M. Sander, Laser Zentrum Hannover e.V. (Germany)
A. Stolte, Laser Zentrum Hannover e.V. (Germany)
C. Doepke, Tieraerztliche Hochschule Hannover (Germany)
W. Baumgaertner, Tieraerztliche Hochschule Hannover (Germany)
H. Lubatschowski, Laser Zentrum Hannover e.V. (Germany)

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

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