gms | German Medical Science

102. Jahrestagung der DOG

Deutsche Ophthalmologische Gesellschaft e. V.

23. bis 26.09.2004, Berlin

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Corneal radii and anterior chamber depth in comparison IOL Master/Orbscan II

Meeting Abstract

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  • corresponding author A.J. Reuland - Heidelberger Forschungsgruppe Intraokularlinsen und Refraktive Chirurgie, Universitäts-Augenklinik, Heidelberg
  • K.A. Becker - Heidelberger Forschungsgruppe Intraokularlinsen und Refraktive Chirurgie, Universitäts-Augenklinik, Heidelberg
  • M.P. Holzer - Heidelberger Forschungsgruppe Intraokularlinsen und Refraktive Chirurgie, Universitäts-Augenklinik, Heidelberg
  • T.M. Rabsilber - Heidelberger Forschungsgruppe Intraokularlinsen und Refraktive Chirurgie, Universitäts-Augenklinik, Heidelberg
  • B.B. Entz - Heidelberger Forschungsgruppe Intraokularlinsen und Refraktive Chirurgie, Universitäts-Augenklinik, Heidelberg
  • G.U. Auffarth - Heidelberger Forschungsgruppe Intraokularlinsen und Refraktive Chirurgie, Universitäts-Augenklinik, Heidelberg

Evidenzbasierte Medizin - Anspruch und Wirklichkeit. 102. Jahrestagung der Deutschen Ophthalmologischen Gesellschaft. Berlin, 23.-26.09.2004. Düsseldorf, Köln: German Medical Science; 2004. Doc04dogP 073

The electronic version of this article is the complete one and can be found online at: http://www.egms.de/en/meetings/dog2004/04dog564.shtml

Published: September 22, 2004

© 2004 Reuland 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

Corneal radii and anterior chamber depth (ACD) are important values for IOL calculations. This study is to test these values in IOL Master vs. Orbscan.

Methods

In a prospective study we evaluated 189 eyes of 98 patients (median 38 y., 95% CI 18 to 62y.). Corneal radii and ACD were measured using IOL Master (Carl Zeiss) and Orbscan II (Bausch & Lomb). The Orbscan sim K-reading was transformed into corneal radi using n=1,3375. Statistics was was performed using the paired Wilcoxon test.

Results

Orbscan measured significantly greater corneal radii (p<0,0001). Using the IOL Master, corneal radii (median) were R1=7,82 mm and R2=7,59 mm. Using the Orbscan, corneal radii (median) were R1=7,90mm and R2= 7,67mm. IOL Master measured significantly greater ACD (p=0,0003). ACD (median, measured from epithelium) using IOL Master was 3,64mm and using Orbscan was 3,60mm.

Conclusions

Orbscan II measures significantly greater corneal radii, equalling 0,5 dpt of keratometric power. IOL Master measures singificantly greater ACDs, but the average difference of 0,04mm has no clinical significance.