Freiburg 2024 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 59: Lasers II
Q 59.6: Talk
Friday, March 15, 2024, 12:15–12:30, HS 1015
Ophthalmic Surgeries with Picosecond Laser Pulses — •Michael Körber1,2, Jakob Fellinger3, Milan Fritsche1, Andreas Giese1, Konstantina Kostourou4, Daniel Kopf3, Manfred Kottcke1, Francesco Luciani5, Josef M. Schmidbauer2,5, Jonathan Wenk1, and Bernd Braun1 — 1Nuremberg Institute of Technology, Nuremberg, Germany — 2Paracelsus Medical University, Nuremberg, Germany — 3MONTFORT Laser GmbH, Götzis, Austria — 4NANEO Precision IBS Coatings GmbH, Lindau, Germany — 5Klinik Nürnberg Nord, Nuremberg, Germany
We demonstrate the advancement of various ophthalmic surgeries by using picosecond laser pulses. The surgeries evaluated were iridotomy, capsulotomy, selective laser-trabeculoplasty and lens fragmentation. The tests were executed on porcine eyes. We used a standard two-stage 12 ps laser and a novel ultra-compact 130 ps laser, as well as state-of-the art Nd:YAG nanosecond lasers as reference to current surgery methods. The picosecond results were significantly better in all aspects tested compared to nanoseconds: The pulse energy could be lowered to some tens of microjoule instead of some millijoule, and the tissue ablation is more precise, more deterministic and less frayed. Furthermore, we measured large differences in shock wave pressures between the pulse lengths. Similar differences were found for the heat input. The results could be transferred to human tissue samples and showed the same advantages. In summary, we achieved substantial benefits with picosecond laser pulses. Thus, the ultra-compact picosecond laser provides a stable basis for a new generation of ophthalmic lasers.
Keywords: Picosecond Laser; Iridotomy; Capsulotomy; SLT; Shock Waves