Comparison Of Higher Order Aberrations In Eyes With Crystalline Lenses And Monofocal Intraocular Lenses

Published 2023 - 41st Congress of the ESCRS

Reference: PO0367 | DOI: 10.82333/54k6-k517

Authors: Andreas Hartwig* ¹ , Nicole Stübiger ²

¹Aston University,Birmingham,United Kingdom, ²University Medical Center Hamburg-Eppendorf,Hamburg-Eppendorf,Germany

Implantations of intraocular lenses is currently the standard of care for patients with cataract. The objective of this study was to investigate the magnitude of higher order aberrations (HOAs) in eyes with either crystalline lenses or monofocal intraocular lenses (IOLs) through clinical data. HOA were presented in terms of root-mean-square (HO RMS, higher order root-mean-aquare).

Privat optometry practice, Heikendorf, Germany

HOAs were routinely measured in patients that attended the clinic for a refraction. A total of 36 patients comprising of 72 eyes were included in the study. In 18 patients crystalline lenses were in place and in 18 patients IOLS were implanted at least four weeks prior to the measurements. Measurements were performed using the i.Profiler (Carl Zeiss, Germany). Four consecutive measurements were taken for each eye and averaged by the internal software. HO RMS values were used for the comparison between the two groups, as the value is a representation of all higher order aberrations. Right eye data and differences between both eyes are presented. Mean values are reported in conjunction with standard deviations. All pupils were scaled to 3 mm.

The mean age of the patients with crystalline lenses was 76 ± 7 years, ranging from 68 to 89 years. Patients with monofocal IOLs were on average 80 ± 6 years old, ranging from 68 to 93 years.

HO RMS for right eyes with crystalline lenses were 0.237 ± 0.129 µm and 0.193 ± 0.102 for eyes with IOLs. The range for crystalline lens eyes was from 0.089 to 0.580 µm and 0.083 to 0.434 µm for eyes with IOLs. The mean difference in spherical equivalence between right and left eyes was -0.42 ± 1.36 D for eyes with crystalline lenses and 0.02 ± 0.90 D. The mean difference for HO RMS between right and left eyes was -0.02 ± 0.17 µm for crystalline lens eyes and -0.03 ± 0.16 for IOL eyes.

Overall a similar distribution of higher order aberrations was observed between the two groups. The mean HO RMS was lower for eyes with IOLs in situ. The mean difference was comparable between both groups. The mean difference in terms of spherical equivalent was reduced in eyes with IOLs.

The details indicate a very good technical performance of monofocal IOLs in terms of HO RMS, which is a better representation of the visual experience than analysing specific Zernike coefficients.

It needs to be acknowledged that the IOLs implanted were not specified and therefore the presented data do not represented a particular IOL, but provides a general overview.