Dr. Silvia Schumacher Profile

Dr. Silvia Schumacher

at IROC AG

SPIE Involvement:

Author

Publications (10)

Proceedings Article | 12 February 2011 Paper

Optimization model for UV-Riboflavin corneal cross-linking

S. Schumacher, J. Wernli, S. Scherrer, M. Bueehler, T. Seiler, M. Mrochen

Proceedings Volume 7885, 78850M (2011) https://doi.org/10.1117/12.876797

KEYWORDS: Cornea, Polymers, Tissues, Absorption, Polymerization, Diffusion, Tissue optics, Ultraviolet radiation, Data modeling, Natural surfaces

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SPIE Journal Paper | 1 November 2010 Open Access

Interaction dynamics of spatially separated cavitation bubbles in water

Nadine Tinne, Silvia Schumacher, Valeria Nuzzo, Cord Arnold, Holger Lubatschowski, Tammo Ripken

JBO, Vol. 15, Issue 06, 068003, (November 2010) https://doi.org/10.1117/12.10.1117/1.3526366

KEYWORDS: Cavitation, Pulsed laser operation, Laser tissue interaction, Laser energy, Laser cutting, Laser optics, Fusion energy, Laser vision correction, Objectives, Femtosecond phenomena

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Proceedings Article | 3 March 2010 Paper

Visualizing of fs laser pulse induced micro-incisions inside crystalline lens tissue

O. Stachs, S. Schumacher, M. Kröger, H. Hoffmann, M. Fromm, A. Heisterkamp, H. Lubatschowski, R. Guthoff

Proceedings Volume 7550, 75500U (2010) https://doi.org/10.1117/12.841584

KEYWORDS: Optical fibers, Laser tissue interaction, Femtosecond phenomena, Visualization, Crystals, Confocal microscopy, Laser cutting, Tissues, Laser crystals, Microscopes

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Proceedings Article | 17 July 2009 Paper

Femtosecond-lentotomy treatment: six-month follow-up of in vivo treated rabbit lenses

S. Schumacher, M. Fromm, U. Oberheide, P. Bock, I. Imbschweiler, H. Hoffmann, A. Beineke, G. Gerten, A. Wegener, H. Lubatschowski

Proceedings Volume 7373, 73730H (2009) https://doi.org/10.1117/12.831899

KEYWORDS: Retina, Optical coherence tomography, Lenses, Tissues, Surgery, Eye, Laser therapeutics, In vivo imaging, Crystals, Laser tissue interaction

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Presbyopia is an age related effect which affects every human at the age of about 40 years. So far reading glasses are the conventional treatment. According to Helmholtz' theory of accommodation one of the mayor reasons for the development of presbyopia is the increasing sclerosis of the lens. In contrast to that the ciliary muscle and the lens capsule remain mostly active and elastic the whole life. So a possible treatment could be the increase of the flexibility of the lens by creating gliding planes with fs-laser pulses inside the lens tissue. In former studies it was shown that fs-laser pulses were able to increase the flexibility of ex vivo porcine lenses as well as ex vivo human donor lenses. Our current aim was to evaluate the effect of the fs-laser pulses on the crystalline lens of living rabbit eyes due to the fs-lentotomy treatment. The main focus of the evaluation was the exclusion of possible side effects of the treatment like cataract formation or retina damage. The treated eyes were monitored using optical coherence tomography (OCT) and Scheimpflug imaging for localizing and studying the tissue effects of the incisions. Furthermore histological sections of the lens and retina were prepared. The rabbits were investigated pre operatively and up to six months post operatively. The fs-laser induced micro incisions were successfully applied to the left lens of each rabbit. The micro incisions within the crystalline lens were detectable with OCT and Scheimpflug imaging up to six month. The imaging within the lens showed a progressive fading of the incisional opacities generated by the femtosecond laser during the six months and no indication of cataract formation was found. OCT and Scheimpflug images emphasize themselves as necessary tools to monitor the micro incisions over time. Histopathological sections of the lens tissue support the findings of the non invasive imaging techniques. Also the histopathological sections of the retina show no thermal induced change due to the irradiation of the fs-pulses.

Proceedings Article | 17 July 2009 Paper

Dynamic and interaction of fs-laser induced cavitation bubbles for analyzing the cutting effect

N. Tinne, S. Schumacher, V. Nuzzo, T. Ripken, H. Lubatschowski

Proceedings Volume 7373, 73730L (2009) https://doi.org/10.1117/12.831896

KEYWORDS: Cavitation, Laser vision correction, Laser cutting, Laser tissue interaction, Pulsed laser operation, Tissue optics, Laser energy, Laser optics, Laser systems engineering, Biological research

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Proceedings Article | 11 February 2008 Paper

Fs-lentotomy: first in vivo studies on rabbit eyes with a 100 kHz laser system

S. Schumacher, U. Oberheide, M. Fromm, W. Ertmer, G. Gerten, A. Wegener, H. Lubatschowski

Proceedings Volume 6844, 68440V (2008) https://doi.org/10.1117/12.759132

KEYWORDS: Laser cutting, Laser therapeutics, Optical coherence tomography, Laser tissue interaction, Eye, Femtosecond phenomena, Laser vision correction, Laser systems engineering, In vivo imaging, Cornea

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Proceedings Article | 13 July 2007 Paper

fs-Lentotomie: changing the accommodation amplitude of presbyopic human crystalline lenses by fs laser pulses

S. Schumacher, U. Oberheide, H. Theuer, M. Fromm, T. Ripken, G. Gerten, W. Ertmer, H. Lubatschowski

Proceedings Volume 6632, 66321G (2007) https://doi.org/10.1117/12.728197

KEYWORDS: Lenses, Laser therapeutics, Crystals, 3D modeling, Data modeling, Laser cutting, Tissues, Femtosecond phenomena, Finite element methods, Laser crystals

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Proceedings Article | 5 March 2007 Paper

Fs-laser induced flexibility increase in the crystalline lens

S. Schumacher, M. Fromm, R. Lakharia, M. Schaefer, U. Oberheide, T. Ripken, P. Breitenfeld, G. Gerten, W. Ertmer, H. Lubatschowksi

Proceedings Volume 6426, 64261C (2007) https://doi.org/10.1117/12.700148

KEYWORDS: Laser therapeutics, 3D modeling, Crystals, Laser cutting, Tissues, Finite element methods, Data modeling, Optical fibers, Glasses, Laser crystals

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Proceedings Article | 7 March 2006 Paper

Investigation of possible fs-LASIK induced retinal damage

S. Schumacher, M. Sander, A. Stolte, C. Doepke, W. Baumgaertner, H. Lubatschowski

Proceedings Volume 6138, 61381I (2006) https://doi.org/10.1117/12.645147

KEYWORDS: Retina, Laser damage threshold, Eye, Cornea, Laser cutting, Laser tissue interaction, Laser systems engineering, Continuous wave operation, Femtosecond phenomena, Laser vision correction

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Proceedings Article | 18 April 2005 Paper

Investigation of retinal damage during refractive eye surgery

Silvia Schumacher, Meike Sander, Carola Döpke, Andrea Gröne, Wolfgang Ertmer, Holger Lubatschowski

Proceedings Volume 5688, (2005) https://doi.org/10.1117/12.588938

KEYWORDS: Eye, Retina, Tissues, Temperature metrology, Cornea, Surgery, Laser vision correction, Laser cutting, Laser damage threshold, Tissue optics

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Showing 5 of 10 publications

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