Evaluation of Different Anterior Chamber Depth Measurement Methods in Pseudophakic Patients
Holzer M. P., Reuland A. J., Entz B. B., Auffarth G. U.
Heidelberg Research Group Intraocular Lenses and Refractive Surgery, Department of Ophthalmology, University of Heidelberg
Purpose: Changes in anterior chamber depth (ACD) are important parameters to evaluate accommodative intraocular lenses. Different measurement methods are possible.
Method: ACD changes after cycloplegic mydriasis were evaluated in 20 pseudophakic eyey of patients with an accommodative IOL. Three methods were analyzed: Orbscan II topography system, IOLMaster and ACD measurement at the slit lamp using the "Jaeger" device.
Results: Prior to cycloplegia the mean ACD was 4.49±0.15mm (Orbscan II), 4.39±0.29mm (IOL-Master) and 4.11±0.28mm (Jaeger). After cycloplegia the mean ACD was 4.50±0.17mm (Orbscan II), 4.59±0.17mm (IOL-Master) and 4.15±0.26mm (Jaeger). ACD changes were 0.01± 0.19 mm (Orbscan II), 0.11±0.17mm (IOL-Master) and 0.02±0.09 (Jäger).
Conclusions: The Scheimpflug based systems (Orbscan or IOL Master) often measure the ACD wrong. The slit lamp based system (Jaeger) is an easy and reliable method to measure ACD in pseudophakic patients.
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