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Side effects in excimer corneal surgery

Corneal thermal gradients
  • T. Bende
  • T. Seiler
  • J. Wollensak
Laboratory Investigations

Abstract

Thermal loading is a significant side effect during excimer laser surgery of the cornea. The maximal temperature rise, which is dependent on fluence and repetition rate of the radiation, amounts to 20° C in excised corneas and 7.5° C in the in situ cornea. The temperature decreases exponentially with increasing distance from the incision with a half-value distance of 610 ± 100 μm. Exposure parameters are recommended to avoid temperature rises greater than 11° C.

Keywords

Public Health Radiation Temperature Rise Repetition Rate Thermal Loading 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Dyer P, Sidhu J (1985) Excimer laser ablation and thermal coupling efficiency to polymer films. J Appl Phys 57:1420–1422Google Scholar
  2. 2.
    Ito T, Ito A, Hieda K, Kobayashi K (1983) Wavelength dependence of inactivation and membrane damage toSaccharomyces cerevisiae cells by monochromatic synchrotron vacuum — UV radiation (145–190 nm). Radiat Res 96:532–548Google Scholar
  3. 3.
    Krueger R, Trokel S, Schubert H (1985) Interaction of ultraviolet laser light with the cornea. Invest Ophthalmol 26:1455–1464Google Scholar
  4. 4.
    Lewis M, Dubin M, Aandahl V (1967) The physical properties of bovine corneal collagen. Exp Eye Res 6:57–69Google Scholar
  5. 5.
    Marshall J, Trokel S, Rothery S, Schubert H (1985) An ultrastructural study of corneal incisions induced by an excimer laser at 193 nm. Ophthalmology 92:749–758Google Scholar
  6. 6.
    Seiler T, Wollensak J (1986) In vivo experiments with the excimer laser — technical parameters and healing processes. Ophthalmologica 192:65–70Google Scholar
  7. 7.
    Sliney D (1985) Laser-tissue interactions. Clin Chest Med 6:203–208Google Scholar
  8. 8.
    Srinivasan R, Leigh W (1982) Ablative photodecomposition: action of far-ultraviolet (193 nm) laser radiation on poly (-ethylene terephthalate-) films. J Am Chem Soc 104:6784–6789Google Scholar
  9. 9.
    Srinivasan R, Dyer P, Braren B (1985) Far-UV laser ablation of cornea: photoacoustic studies. IBM Report, Life Sci RC 11620 (no. 52044)Google Scholar
  10. 10.
    Trokel S, Srinivasan R, Braren B (1983) Excimer laser surgery of the cornea. Am J Ophthalmol 96:710–715Google Scholar

Copyright information

© Springer-Verlag 1988

Authors and Affiliations

  • T. Bende
    • 1
  • T. Seiler
    • 1
  • J. Wollensak
    • 1
  1. 1.Universitäts-Augenklinik im Klinikum CharlottenburgBerlin 19

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