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Graefe's Archive for Clinical and Experimental Ophthalmology

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11-11-2023 | Cataract | Cataract

Tolerance to residual astigmatism of an isofocal intraocular lens

Authors: Lidia Pérez-Sanz, Fidel Vega, Juan A. Azor-Morón, Fátima Cuellar, María S. Millán, Nuria Garzón

Published in: Graefe's Archive for Clinical and Experimental Ophthalmology | Issue 4/2024

Abstract

Purpose

To evaluate the impact of residual astigmatism on the optical and visual performance of an enhanced-monofocal isofocal intraocular lens (EM Isopure, BVI medical, Belgium) compared to a monofocal one (Micropure, BVI medical, Belgium).

Methods

Laboratory investigation and prospective, comparative and randomized clinical study. Optical quality was assessed on an optical bench for 2.0, 3.0, and 4.5 mm pupils. The effect of residual astigmatism was investigated from through-focus images recorded with increasing amounts of regular positive astigmatism induced with a deformable mirror. To evaluate the impact of residual astigmatism, 28 eyes of 28 patients were randomly assigned to either group. Residual astigmatism was induced with positive and negative cylinder lenses at 90 and 180°. Visual acuity (VA) was measured at each step.

Results

The optical performance of both IOLs was quite similar for 2.0 and 3.0 mm pupils. For 4.5-mm pupil, the EM Isopure showed a significant reduction of its optical quality in comparison with the monofocal IOL. When visual performance was evaluated, no statistically significant differences were found for any power of induced astigmatism. More differences were found when positive induced astigmatism was compared within each group, and VA was better when the astigmatism was induced at 180° vs. 90°. The greatest differences were found for and induced positive astigmatism of + 1.50D (p = 0.009 for Isopure and p = 0.023 for Micropure).

Conclusions

The tolerance to residual astigmatism of the EM Isopure lens is similar to that of a reference monofocal lens with pupils up to 3.5 mm.

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Title: Tolerance to residual astigmatism of an isofocal intraocular lens
Authors: Lidia Pérez-Sanz
Fidel Vega
Juan A. Azor-Morón
Fátima Cuellar
María S. Millán
Nuria Garzón
Publication date: 11-11-2023
Publisher: Springer Berlin Heidelberg
Keyword: Cataract
Published in: Graefe's Archive for Clinical and Experimental Ophthalmology / Issue 4/2024
Print ISSN: 0721-832X
Electronic ISSN: 1435-702X
DOI: https://doi.org/10.1007/s00417-023-06305-9

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Springer Medicine

Tolerance to residual astigmatism of an isofocal intraocular lens

Abstract

Purpose

Methods

Results

Conclusions

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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