gms | German Medical Science

102. Jahrestagung der DOG

Deutsche Ophthalmologische Gesellschaft e. V.

23. bis 26.09.2004, Berlin

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Localisation of the thinnest point of the cornea using topographical pachymetry of the Orbscan II system

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  • corresponding author I. J. Limberger - Heidelberg Research Group Intraocular Lenses and Refractive Surgery, Department of Ophthalmology, University of Heidelberg, Heidelberg
  • M. P. Holzer - Heidelberg Research Group Intraocular Lenses and Refractive Surgery, Department of Ophthalmology, University of Heidelberg, Heidelberg
  • B. B. Entz - Heidelberg Research Group Intraocular Lenses and Refractive Surgery, Department of Ophthalmology, University of Heidelberg, Heidelberg
  • A. J. Reuland - Heidelberg Research Group Intraocular Lenses and Refractive Surgery, Department of Ophthalmology, University of Heidelberg, Heidelberg
  • G. U. Auffarth - Heidelberg Research Group Intraocular Lenses and Refractive Surgery, Department of Ophthalmology, University of Heidelberg, Heidelberg

Evidenzbasierte Medizin - Anspruch und Wirklichkeit. 102. Jahrestagung der Deutschen Ophthalmologischen Gesellschaft. Berlin, 23.-26.09.2004. Düsseldorf, Köln: German Medical Science; 2004. Doc04dogP 033

The electronic version of this article is the complete one and can be found online at: http://www.egms.de/en/meetings/dog2004/04dog524.shtml

Published: September 22, 2004

© 2004 Limberger et al.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by-nc-nd/3.0/deed.en). You are free: to Share – to copy, distribute and transmit the work, provided the original author and source are credited.

Outline

Text

Objective

US- and Laserpachymetry can only measure individual points on the cornea. The Orbscan II Topography system gives a topographical map of the thickness of the entire cornea.

Methods

Orbscan measurements were performed in 30 healthy volunteers (60 eyes) aged 57.9±20.9 years using the Orbscan II topography system.

Results

Average central corneal thickness was 572± 44.9μm, the corneal thickness at the thinnest point was 547.2±67.6μm. Localisation of thinnest point was in 48.2% of eyes the inferior temporal, in 23.2% the superior nasal, in 21.4% the superior temporal and in 7,1% the inferior nasal quadrant.

Conclusions

Central pachymetry data can deviate by 5-10% from the thinnest point of the cornea. The thinnest point of the corneal thickness is most frequently located in the inferior temporal quadrant.