Pressure wave focusing effects following laser medical procedures in human eyes

Horvat, Darja (author), Požar, Tomaž (author), Starman, Bojan (author), Halilovič, Miroslav (author), Petkovšek, Rok (author)

Comparative analysis of pressure wave propagation, following laser-induced ablation of the human cornea, was performed. Evolution of the pressure field as well as temporal and spatial dependencies of the transient pressure amplitudes created at various input laser parameters, corresponding to different typical procedures of laser eye surgery, is presented comprehensively. The computations were performed with the next generation of the acoustic eye model, previously validated against existing measurements. The analysis allows the assessment of potentially problematic regions within the eye where the resultant positive and/or negative pressure may exceed values which are considered safe for the patient.

• Language: English
• Keywords: shock waves, photoablation, laser ultrasonics, cavitation, acoustic focusing, negative pressure
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Submitted Version
• Year: 2020
• Number of pages: Str. 1-9
• Numbering: Vol. 126, iss. 6
• PID: 20.500.12556/RUL-116142
• UDC: 519.6:615.849.7(045)
• ISSN on article: 0947-8396
• DOI: 10.1007/s00339-020-03539-w
• COBISS.SI-ID: 15652611
• Publication date in RUL: 18.05.2020

Record is a part of a journal

• Title: Applied physics
• Shortened title: Appl. phys., A, Mater. sci. process.
• Publisher: Springer
• ISSN: 0947-8396
• COBISS.SI-ID: 14196007

Secondary language

• Language: Slovenian
• Title: Učinki fokusiranja tlačnega vala po laserskih medicinskih postopkih v človeških očeh

Abstract

Izvedena je bila primerjalna analiza širjenja tlačnega vala po laserski ablaciji človeške roženice. Izčrpno je predstavljeno širjenje tlačnega polja ter časovne in prostorske odvisnosti amplitud tlaka, ustvarjenih z različnimi vhodnimi laserskimi parametrih, ki ustrezajo različnim značilnim postopkom laserskih operacij oči. Izračuni so bili izvedeni z naslednjo generacijo akustičnega modela očesa, predhodno potrjenim z naslombo na obstoječe meritve. Analiza omogoča oceno potencialno problematičnih področij v očesu, kjer lahko pozitivni in/ali negativni tlak preseže vrednosti, ki veljajo za varne za pacienta.

• Keywords: udarni valovi, fotoablacija, laserski ultrazvok, kavitacija, akustično fokusiranje, negativni tlak