M. Patzlaff-Günther
M. Fromm
T. Kern
M. Bartram
A. Schwäblein
D. Heinemann
S. Johannsmeier
C. Framme
T. Ripken

Measurement of tear resistance after manual capsulorhexis and femtosecond laser–assisted capsulotomy of crystalline lenses

Laser Med. Sci.
Type: Zeitschriftenaufsatz (reviewed)

Background - In this study, the tear resistance of porcine lens capsules after continuous curvilinear capsulorhexis (CCC) and femtosecond (fs)-laser assisted capsulotomy for cataract surgery (FLC) with different laser parameters is measured with a custom-made testing setup. Methods - Forty-five fresh porcine lenses were randomly chosen for CCC (n=15) or FLC 1 (n=15) and FLC 2 (n=15). The FLC 1-group was treated with smaller spot distances than the FLC 2-group. The force necessary to break the opening of the anterior capsule and the maximum displacement were measured. Results - The mean tear resistance of the CCC-group (150 ± 70 mN) was higher than that of the FLC 1-group (60 ± 20 mN) and the FLC 2-group (30 ± 20 mN). Conclusion - It could be shown that CCC leads to a significantly higher tear resistance of the opening than FLC in porcine lenses. The femtosecond laser group demonstrated that smaller spot distances lead to a higher tear resistance.