Abstract
Purpose
To evaluate the visual performance of an extended depth of focus (EDOF) intraocular lens (IOL) for patient selection.
Methods
This prospective non-comparative case series evaluated fifty-two eyes (26 patients) after bilateral implantation of the Tecnis Symfony IOL. Exclusion criteria were previous ocular surgeries, corneal astigmatism of >1.5 diopter, and ocular pathologies or corneal abnormalities. Uncorrected (UCVA) and distance-corrected (DCVA) visual acuity (VA) in 4 m, 80 cm, 60 cm and 40 cm (logMAR), defocus curve, contrast sensitivity (CS) and a questionnaire on subjective quality of vision (QoV) were assessed after 3 months.
Results
UCVA was −0.02 ± 0.071 logMAR at 4 m, 0.01 ± 0.077 logMAR at 80 cm, 0.08 ± 0.187 logMAR at 60 cm and 0.22 ± 0.153 logMAR at 40 cm. Defocus curve testing showed a flat VA range from 0.00 to −1.50 D (−0.05–0.02 logMAR). At near distance from −2.0 to −2.5 D a dip of DCVA was observed (0.14–0.28 logMAR). CS under photopic and mesopic conditions without and with glare was 1.56 logCS, 0.86 logCS, 0.78 logCS, respectively. Spectacle independence was achieved in 100% for distance and intermediate vision and 71% of patients at near distance.
Conclusion
This EDOF IOL provides excellent intermediate and far (<0.1 logMAR) and acceptable near UCVA (<0.3 logMAR). Defocus curve testing confirmed an EDOF between far and intermediate distance and showed a dip at near distance. It provides good QoV, CS, high spectacle independence, perception of few optical phenomena, and particularly good night-driving capabilities.
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T Kohnen: Consultant and Research for Abbott/J&J, Alcon/Novartis, Avedro, Oculentis, Oculus, Presbia, Schwind, and Zeiss. Consultant for Allergan, Bausch & Lomb, Dompé, Geuder, Merck, Rayner, Santen, Staar, Thea, Tear Lab, Thieme and Ziemer. Research for Hoya.
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Myriam Böhm, Eva Hemkeppler, Nina DeLorenzo, Sabrina Schönbrunn, Michael Herzog, Kerstin Petermann have no financial interests to disclose. All authors attest that they meet the current ICMJE criteria for authorship. This research did not receive any specific grants from funding agencies in the public, commercial, or not-for-profit sectors.
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Kohnen, T., Böhm, M., Hemkeppler, E. et al. Visual performance of an extended depth of focus intraocular lens for treatment selection. Eye 33, 1556–1563 (2019). https://doi.org/10.1038/s41433-019-0443-x
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DOI: https://doi.org/10.1038/s41433-019-0443-x
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