Tomaž Požar (Author), Rok Petkovšek (Author)

Abstract

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

Keywords

kavitacija;optični preboj;akustični fokus;negativni tlak;udarni valovi;cavitation;optical breakdown;acoustic focus;negative pressure;shock waves;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FS - Faculty of Mechanical Engineering
UDC: 535(045)
COBISS: 16998683 Link will open in a new window
ISSN: 2156-7085
Views: 975
Downloads: 611
Average score: 0 (0 votes)
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Other data

Secondary language: Slovenian
Secondary keywords: kavitacija;optični preboj;akustični fokus;negativni tlak;udarni valovi;
Type (COBISS): Article
Pages: f. 432-447
Volume: ǂVol. ǂ11
Issue: ǂno. ǂ1
Chronology: Jan. 2020
DOI: 10.1364/BOE.11.000432
ID: 11362097