Image Quality Versus Decentration In Aspheric Iols Regarding The Spatial Frequency
Published 2023 - 41st Congress of the ESCRS
Reference: PP20.16 | Type: Free paper | DOI: 10.82333/wj2t-9018
Authors: Stefan Pieh* 1 , Cornelia Artmayr 1 , Viktoria Pai 1 , Daniel Schartmüller 1 , Katharina Kriechbaum 1
1Medical University Vienna,Vienna,Austria
Purpose
The extent of spherical aberration correction of an IOL correlates with its decentration sensitivity. The aim of this investigation on an optical bench is to split the decentration sensitivity according to different spatial frequencies. Furthermore, the influence of the spherical aberration of the cornea on the decentration sensitivity of aberration-correcting IOLs is investigated.
Setting
Medical University Vienna
Department of Ophthalmology and Optometry
Methods
The image quality for 25 lp/mm, 50 lp/mm and 100 lp/mm is determined on an optical bench for three IOLs with the best centering and up to a decentering of 0.5 mm. The lenses tested are the aberration-neutral 409 MP (Zeiss), the Primus HD (OphthalmoPro) with an aberration correction of -0.18 µm and the ZBC00 (J&J) with an aberration correction of -0.27 µm. Green light and two different corneas with a spherical aberration of +0.13 µm or +0.28 µm are used for the examinations.
Results
The decentration sensitivity of the IOL is positively correlated with the amount of spherical aberration correction of the IOL and the amount of spherical aberration correction of the cornea. The high spatial frequencies are affected first.
Conclusions
The preoperative adjustment of the spherical aberration correction to the respective cornea is particularly important for the high resolving power and for the perception of fine contrasts.