Mechanisms of corneal intrastromal laser dissection for refractive surgery: ultra-high-speed photographic investigation at up to 50 million frames per second

Sebastian Freidank, Alfred Vogel, Norbert Linz

Abstract

Every year, more than a million refractive eye surgeries using femtosecond lasers are performed but the intrastromal cutting process remains an area of development. We investigated the mechanisms of laser dissection in cornea by ultra-high-speed photography. We found that the intrastromal bubble forms multiple lobes along the elongated laser plasma and the overlying lobes expand along the corneal lamellae. Videography demonstrated that the cutting process relies on crack propagation in the stroma along the bubble lobes with the crack originating from the pre-existing bubble layer. These insights are important for further improvement of the cutting mechanisms in refractive surgery.
Original languageEnglish
Article number5
JournalBiomedical Optics Express
Volume2022
Issue number13
Pages (from-to)3056-3079
Number of pages24
DOIs
Publication statusPublished - 01.05.2022

Research Areas and Centers

  • Academic Focus: Biomedical Engineering

DFG Research Classification Scheme

  • 308-01 Optics, Quantum Optics, Atoms, Molecules, Plasmas

Fingerprint

Dive into the research topics of 'Mechanisms of corneal intrastromal laser dissection for refractive surgery: ultra-high-speed photographic investigation at up to 50 million frames per second'. Together they form a unique fingerprint.

Cite this