Abstract

DO.17.10

Objective measurement of accommodation by using a dynamic stimulation aberrometer

Elling M., Dick H. B.
University Eye Hospital, Knappschaftskrankenhaus Bochum-Langendreer, Bochum, Germany

Objective: To evaluate accuracy, reproducibility as well as intra- and inter-observer reliability by using a dynamic stimulation aberrometer.
Methods: Dynamic Stimulation Aberrometry (DSA) enables binocular dynamic accommodation stimulation during regular wavefront measurements.
All measurements in this study were performed by using a Hartmann-Shack aberrometer with an upgrade kit for DSA. Forty normal healthy eyes and sixteen pseudophakic eyes (including eyes with accommodating IOLs) were measured with regards to reproducibility, accuracy as well as intra- and inter-observer reliability.
Patients focussed at a distance target for 3 seconds, followed by a near target for 3 seconds and then again at a distance target for further 3 seconds. During these 9 seconds, a total of 300 single measurements were performed. The dynamic course of changes in low-order aberrations (sphere and astigmatism) as well as high-order aberrations were analysed.
Results: Dynamic stimulation aberrometry allows objective and observer-independent measurements of changes in accommodation in phakic and pseudophakic eyes. We recommend the use of this technology in addition to the common psychophysical examinations to attain objective information on the range of accommodation, sphere, cylinder, axis and pupil size.
During our study the used dynamic stimulation aberrometer showed a high degree of accuracy in all measurements.
Conclusions: The dynamic stimulation aberrometer is an interesting alternative which enlarges the diagnostic spectrum by an objective measurement of the range of accommodation (e.g. after implantation of accommodating IOLs).

Copyright: Porstmann Kongresse GmbH. All rights reserved. Impressum, Disclaimer.