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Impressum
Ultrasound and optical measurement of anterior chamber depth
Baumeister M., Dreiss A., Liedtke S., Wellermann G., Kohnen T.
Zentrum der Augenheilkunde, Klinikum der Johann Wolfgang Goethe- Universität, Theodor-Stern-Kai 7, 60590 Frankfurt am Main
Objective: To compare the results of anterior chamber depth measurement
between one ultrasound and two optical measurement devices.
Methods: In 29 eyes of 18 cataract patients, anterior chamber depth
(from the corneal epithelium to the anterior surface of the lens) was
measured using the ultrasound device Model-ABD (Innovative Imaging), the
optical biometry instrument IOL-Master (Zeiss) and the anterior segment
measurement system Orbscan II (Orbtek).
Results: The average anterior chamber depth was 3.31 ± 0.34
mm with the ultrasound measurement, 3.13 ± 0.34 mm with the IOL
Master and 3.30 ± 0.53 mm with the Orbscan. Correlation coefficient
was 0.18 for ultrasound vs. IOL-Master, 0.53 for ultrasound vs. Orbscan
and 0.41 for Orbscan vs. IOL-Master.
Conclusion: Although all measurement devices delivered similar
average results, there was only weak correlation between the measurements.
The measurements on a single individual may differ widely.