Cavitation induced by shock wave focusing in eye-like experimental configurations

Požar, Tomaž (author), Petkovšek, Rok (author)

During laser-induced, breakdown-based medical procedures in human eyes such as posterior capsulotomy and vitreolysis, shock waves are emitted from the location of the plasma. A part of these spherically expanding transients is reflected from the concave surface of the corneal epithelium and refocused within the eye. Using a simplified experimental model of the eye, the dominant secondary cavitation clusters were detected by high-speed camera shadowgraphy in the refocusing volume, dislocated from the breakdown position and described by an abridged ray theory. Individual microbubbles were detected in the preheated cone of the incoming laser pulse and radially extending cavitation filaments were generated around the location of the breakdown soon after collapse of the initial bubble. The generation of the secondary cavitation structures due to shock wave focusing can be considered an adverse effect, important in ophthalmology.

• Language: English
• Keywords: cavitation, optical breakdown, acoustic focus, negative pressure, shock waves
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2020
• Number of pages: Str. 432-447
• Numbering: Vol. 11, no. 1, art. 379761
• PID: 20.500.12556/RUL-113443
• UDC: 535(045)
• ISSN on article: 2156-7085
• DOI: 10.1364/BOE.11.000432
• COBISS.SI-ID: 16998683

Copyright

V članku navedeno: "© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement"; s povezavo https://www.osapublishing.org/library/license_v1.cfm. (31. 3. 2021)

• Publication date in RUL: 07.01.2020

Record is a part of a journal

• Title: Biomedical optics express
• Shortened title: Biomed. opt. express
• Publisher: Optica
• ISSN: 2156-7085
• COBISS.SI-ID: 24857383

Secondary language

• Language: Slovenian
• Keywords: kavitacija, optični preboj, akustični fokus, negativni tlak, udarni valovi