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Measurement of the Horizontal Corneal Diameter: Orbscan II vs. Zeiss IOL Master

Baumeister M., Terzi E., Ekici Y., Kohnen T.,
Johann-Wolfgang-Goethe-Universität, Klinik für Augenheilkunde (Frankfurt/Main)

Purpose: Comparison of automated measurement methods for the horizontal corneal diameter (white-to-white, WTW).
Method: Corneal diameter measurements of 92 eyes taken with the Orbscan II topography system and the Zeiss IOL Master were compared to measurements on magnified anterior segment photographs.
Results: The mean measurement values of the Orbscan (11,79 ± 0,46 mm) and the IOL Master (12,02 ± 0,37 mm) were well correlated to the reference values taken from the photographs (12,09 ± 0,61 mm). There were no significant discrepancies.
Conclusions: Both devices provide reliable values for determination of the corneal diameter.

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