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Comparability and reproducibility of four wavefront aberrometers for measuring lower and higher order aberrations in pseudophakic eyes

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Session Details

Session Title: Ocular Pathologies

Session Date/Time: Tuesday 08/09/2015 | 16:30-18:00

Paper Time: 17:34

Venue: Room 1

First Author: : P.Nguyen AUSTRIA

Co Author(s): :    N. Hirnschall   B. Doeller   N. Luft   O. Findl           

Abstract Details


To compare measurements of lower and higher order aberrations (HOA) obtained with four different wavefront aberrometers and to assess their reproducibility.


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


This prospective study included pseudophakic otherwise healthy patients. Four wavefront aberrometers were compared. Three of the aberrometers in this study are combined with coneal topographers. Two of the devices use a Hartmann-Shack sensor (WASCA, Carl Zeiss Meditec AG; iDesign Advanced WaveSan aberrometer, Abbott Medical Optics), one device works on the basis of ray tracing (iTrace, Tracey Technologies), one device utilizes automated retinoscopy (OPD-ScanIII; NIDEK Co. Ltd.). All patients are measured with an autorefractometer (Topcon, Japan) and also a subjective refraction has been performed. In addition a Purkinjemeter measurement has been done.


In total, 51 eyes of 51 patients were included. Mean difference concerning RMS of all HOA was 0.013µm between Wasca and iDesign and 0.039µm between Wasca and OPD. SD of 4 repeated measurements for the iTrace, WASCA, iDesign and OPD Scan concerning RMS was 0.19µm (SD:0.25), 0.03µm (SD:0.02), 0.04µm (SD:0.07) and 0.07µm (SD:0.09), respectively. This difference was found to be significant (multiple pair wised comparison with Bonferroni correction p<0.001). Same results (p<0.001) for spherical aberrations were 0.07µm (SD:0.13), 0.04µm (SD:0.04), 0.02µm (SD:0.01) and 0.03µm (SD:0.03), respectively. Details for HOA will be presented at the meeting.


Feasibility was found to be excellent for Wasca and iDesign and was high for iTrace but for the OPD Scan there was a flat learning curve Reproducibility was found to be good for all devices but slightly weaker for the iTrace device.

Financial Interest:


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