Comparability and reproducibility of four wavefront aberrometers for measuring lower and higher order aberrations in pseudophakic eyes
Abstract
Purpose
To compare measurements of lower and higher order aberrations (HOA) obtained with four different wavefront aberrometers and to assess their reproducibility.
Methods
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.
Results
In total, 51 eyes of 51 patients were included. No patient was lost to follow-up. Mean difference concerning root mean square of all higher order aberrations was 0.013 µm between Wasca and iDesign and 0.113 µm between Wasca and OPD, respectively. Reproducibility was found to be between 0.09 µm (SD:0.06) (iDesign) and 0.41 µm (SD: 0.12) (iTrace). Details for higher order aberrations will be presented at the meeting.
Conclusions
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.
