Stress wave amplitudes during laser surgery of the cornea

Ronald R. Krueger, Theo Seiler, Torsten Gruchman, Michael Mrochen, Michael S. Berlin

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

Purpose: To determine the stress wave amplitudes generated during photoablation of the cornea using an argon fluoride excimer laser. Design: Experimental study using porcine eyes. Methods: Profiles of the stress wave amplitudes and enucleated human eyes along the axis of symmetry of porcine eyes and enucleated human eyes were measured using a miniature piezoelectric transducer. The ablation parameters, fluence, and ablation diameters were varied within the range of clinical application. Main Outcome Measures: Stress wave amplitudes generated during photoablation. Results: The stress waves pass through a pressure focus located in the posterior lens and anterior vitreous, where amplitudes of up to 100 atm were measured with a 6-mm or larger ablation zone. Posterior to this focus, the stress wave amplitudes rapidly decrease to less than 10 atm at the retinal site. Small diameter excimer laser spots (≤1.5 mm) produce a declining stress wave with no pressure focus at the lens and anterior vitreous. Conclusions: Stress waves may be potentially hazardous to anterior structures of the human eye, including the corneal endothelium, lens and anterior vitreous face. They peak at the lens and vitreous with a broad beam, but not with small spot laser ablation. At posterior retinal and subretinal structures, they may be considered harmless.

Original languageEnglish (US)
Pages (from-to)1070-1074
Number of pages5
JournalOphthalmology
Volume108
Issue number6
DOIs
StatePublished - Jun 13 2001

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Laser Therapy
Cornea
Lenses
Excimer Lasers
Swine
Pressure
Corneal Endothelium
Transducers
Research Design
Outcome Assessment (Health Care)

ASJC Scopus subject areas

  • Ophthalmology

Cite this

Krueger, R. R., Seiler, T., Gruchman, T., Mrochen, M., & Berlin, M. S. (2001). Stress wave amplitudes during laser surgery of the cornea. Ophthalmology, 108(6), 1070-1074. https://doi.org/10.1016/S0161-6420(01)00570-X

Stress wave amplitudes during laser surgery of the cornea. / Krueger, Ronald R.; Seiler, Theo; Gruchman, Torsten; Mrochen, Michael; Berlin, Michael S.

In: Ophthalmology, Vol. 108, No. 6, 13.06.2001, p. 1070-1074.

Research output: Contribution to journalArticle

Krueger, RR, Seiler, T, Gruchman, T, Mrochen, M & Berlin, MS 2001, 'Stress wave amplitudes during laser surgery of the cornea', Ophthalmology, vol. 108, no. 6, pp. 1070-1074. https://doi.org/10.1016/S0161-6420(01)00570-X
Krueger, Ronald R. ; Seiler, Theo ; Gruchman, Torsten ; Mrochen, Michael ; Berlin, Michael S. / Stress wave amplitudes during laser surgery of the cornea. In: Ophthalmology. 2001 ; Vol. 108, No. 6. pp. 1070-1074.
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