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. 2022 Mar 8;11(6):1480.
doi: 10.3390/jcm11061480.

Polychromatic Assessment of a Refractive Segmented EDOF Intraocular Lens

Scott García  1 , Luís Salvá  1 , Salvador García-Delpech  2 , Anabel Martínez-Espert  2   3 , Vicente Ferrando  4 , Diego Montagud-Martínez  3   4
Affiliations

Polychromatic Assessment of a Refractive Segmented EDOF Intraocular Lens

Scott García et al. J Clin Med. .

Abstract

This study aimed to evaluate in vitro performance refractive segmented EDOF intraocular lenses under polychromatic light using an optical bench that complies with the ISO 11979-2 Norm. The through focus modulation transfer function (TF-MTF) of the Femtis Comfort LS-313 MF15 (Oculentis GmbH, Berlin, Germany) IOL was evaluated for IOLs with three different base powers. The effect of the asymmetry of the segmented designs was evaluated with 3 different wavelengths and with polychromatic light at a 3.0 mm and 5.0 mm pupil diameter. It was demonstrated that the TF-MTF curves exhibit a bifocal profile that, in practice, results in an EDOF design. As a consequence of the LCA, the TF-MTF values in white light were lower than in monochromatic light. Images of the USAF test chart were obtained to confirm the prediction of the TF-MTFs. We found that Femtis Comfort is a bifocal low-addition IOL and this fact can result in an EDOF effect which was obtained previously in clinical trials. Moreover, we showed that the base power influences the IOL optical quality, which results as more effective for high powers (hyperopic eyes) than for low powers (myopic eyes). The LCA of the segmented refractive design was very low and presumably not clinically relevant.

Keywords: EDOF IOLs; chromatic aberration; optical bench; presbyopia correcting IOLs; refractive segmented IOLs.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Power distribution in the Femtis Comfort lenses for 15 D (a), 20 D (b), and 30 D (c) base power. The blue and yellow areas indicate the labeled distance and near powers, respectively.
Figure 2
Figure 2
Optical bench. The test object can be illuminated by a monochromatic or polychromatic collimated beam (see the main text for details).
Figure 3
Figure 3
Numerically calculated (a,d) and experimentally obtained (b,e) monochromatic tangential and sagittal MTFs. The average MTFs, numerical (blue lines) and experimental (red lines), for 3.0 mm and 5.0 mm pupil diameters are shown in the graphs on the right (c,f).
Figure 4
Figure 4
Polychromatic TF-MTFs of Femtis Comfort lenses of different base power.
Figure 5
Figure 5
Experimental polychromatic USAF test images, at different vergences, obtained for a 30 D power lens with 3.0 mm pupil diameter.
See this image and copyright information in PMC

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