Posters

Repeatability of lower and higher order aberration measurements in pseudophakic patients using a Hartmann-Shack device

Poster Details

First Author: M. Ullrich AUSTRIA

Co Author(s):    C. Leisser   N. Hirnschall   O. Findl              

Abstract Details

Purpose:

The aim of this study was to assess the repeatability of lower and higher order aberration measurements using a standard Hartmann-Shack sensor device in pseudophakic patients.

Setting:

Vienna Institute for Research in Ocular Surgery, A Karl-Landsteiner-Institute, Hanusch Hospital, Vienna, Austria.

Methods:

Pseudophakic patients were recruited at a minimum of one month after their cataract surgery. All patients were pharmacologically dilated (tropicamide 0,5%, Agepha). Patients who failed to dilate sufficiently (i.e. pupil size < 2.5mm) were excluded. Three consecutive measurements were performed on the same day with a Hartmann-Shack aberrometry device (WASCA, Carl Zeiss Meditec AG, Germany).

Results:

In total, 200 eyes of 200 patients were included, 112 were right eyes, 88 left eyes. The average pupil size was 5.34 mm (SD 1.01 mm). The mean spherical equivalent was -0.77 D (SD 1.10 D), the mean cylinder -0.93 D (SD 0.63 D). The mean standard deviation between the three measurements was 0.13 D (SD 0.15D) and 0.09 D (SD 0.11D), respectively. Spherical aberration (Z(4,0)) was on average −0.28 μm (SD 0.37). The mean standard deviation of the spherical aberration between the three measurements was 0.06 μm (SD 0.05). Further results will be presented.

Conclusions:

In all patients measurements up to the 4th order could be obtained with high feasibility. Wave-front aberrometry using the WASCA Hartmann-Shack device showed excellent repeatability for lower order aberrations and good repeatability for spherical aberration measured.

Financial Disclosure:

NONE