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Proceedings Paper

Influence of the ablation plume on the removal process during ArF-excimer laser photoablation
Author(s): Christina Doerbecker; Holger Lubatschowski; Stefan Lohmann; Christine Ruff; Omid Kermani; Wolfgang Ertmer
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Paper Abstract

Correction of myopia with the ArF-excimer laser (PRK) sometimes leads to a so called 'central island' formation on the anterior corneal surface. The attenuation of the laser beam by the ablation plume might be one reason for this phenomenon. The attenuation properties of the ablation plume were investigated by a probe beam parallel to the surface of the tissue probe. By varying the laser parameters (fluence, repetition rate, spot size) and the target tissue (cornea, PMMA) the attenuation of the probe beam was measured time and spatial resolved. As a result of this study, a significant influence of the removal process due to scattering and absorption within the ablation plume can be assumed as a function of repetition rate, spot size and air flow on the tissue surface.

Paper Details

Date Published: 10 January 1996
PDF: 8 pages
Proc. SPIE 2632, Lasers in Ophthalmology III, (10 January 1996); doi: 10.1117/12.229576
Show Author Affiliations
Christina Doerbecker, Univ. Hannover (Germany)
Holger Lubatschowski, Univ. Hannover and LASERFORUM GmbH Koeln (Germany)
Stefan Lohmann, Univ. Hannover (Germany)
Christine Ruff, Univ. Hannover (Germany)
Omid Kermani, LASERFORUM GmbH Koeln (Germany)
Wolfgang Ertmer

Published in SPIE Proceedings Vol. 2632:
Lasers in Ophthalmology III
Reginald Birngruber; Adolf Friedrich Fercher, Editor(s)

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