Six optical biometry devices in a field test: comparability, reproducibility and handling

Session Details

Session Title: Cataract

First Author: R. Varsits Austria

Co. Authors :    P. Nguyen   B. Döller   S. Schuschitz   N. Hirnschall   O. Findl        

Abstract Details:


To assess the differences and the reproducibility of six different biometry devices in eyes with moderate to dense cataract.


Vienna Institute for Research in Ocular Surgery, Department of Ophthalmology, Hanusch Hospital, Vienna


This prospective study included phakic eyes with moderate to dense cataracts. Six different optical biometers were compared (AL-Scan, Nidek Co. LTD. (Japan); Aladdin, Topcon Europe Medical B.V. (Japan); Galilei G6, Ziemer Ophthalmic Systems AG (Switzerland); IOL – Master 700, Carl Zeiss Meditec AG (Germany); Lenstar LS900, Haag-Streit Diagnostics (Switzerland); OA-2000, Tomey GmbH (Japan)).Each patient was measured three times by one examiner.The order of the devices and the examiner for each patient was assigned randomly.Additionally to assessing axial eye length, anterior chamber depth, corneal radii and lens thickness, the duration of data entry, measurement time and analysis time were evaluated.


In total, 53 eyes of 53 patients were included. The mean age of the patients was 72.1 years (SD: 10.5Y). Three measurements of every patient at every device were done. The highest number of successful scans was achieved with the OA-2000 (98.7%) and the lowest number with the Galilei G6 (78.5%). Also the total measurement time showed that the AL-Scan (56.7s SD: 21.7s) and the OA-2000 (60.9s SD: 26.6s) were the quickest devices and the Galilei G6 (104.6s SD: 47.1s) was the slowest device.


Feasibility was found to be high for all devices, but there were differences between the devices in the handling, the data entry, the measurement process and after all the results. Some patients with a dense cataract could only be measured at on certain devices. FINANCIAL DISCLOUSRE: NONE