Distribution of intraocular lens tilt and decentration and its influence on higher order aberrations

Session Details

Session Title: Cataract Surgery Outcomes

Session Date/Time: Tuesday 16/09/2014 | 08:00-10:30

Paper Time: 09:20

Venue: Capital Hall A

First Author: : A.Prinz AUSTRIA

Co Author(s): :    N. Hirnschall   J. Tabernero   P. Artal   O. Findl     

Abstract Details

Purpose:

To show the distribution of tilt and decentration of intraocular lenses and its influence on higher order aberrations.

Setting:

Dept. of Ophthalmology, Hanusch Hospital, Vienna, Austria

Methods:

In this continuous cohort study, patients were included, who underwent cataract surgery 3 months prior to recruitment. A second measurement was performed 9 months later in a sub-group of patients. In all patients Purkinje meter measurements were performed using a novel modified Purkinje meter. This device is based on capturing and recording Purkinje images of a semicircular ring of LEDs. Additionally, Hartmann Shack sensor measurements (WASCA, Carl Zeiss Meditec AG, Germany) were performed at both follow-ups to assess higher order aberrations (HOAs).

Results:

In total, 350 eyes of 350 patients were included in this study. Mean age was 74.1 years (SD: 8.6, range: 44 to 91 years). Mean tilt and decentration of four different IOLs were 3.9° (SD: 2.3; range: 0.2 to 16.2) and 0.4mm (SD: 0.2; range: 0.0 to 1.7), respectively. Spherical aberration (mean: -0.20µm; SD: 0.43µm) was shown to have only a moderate correlation with tilt changes. A model explaining the influence of tilt and decentration on HOAs will be presented using the Atchison approach.

Conclusions:

Although higher order aberrations correlate moderately with post-operative tilt changes, there were some cases with severe changes in higher order aberrations that could not be explained by post-operative tilt and decentration changes alone.

Financial Interest:

NONE