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Orientation of the intermediate-vision zone of rotationally asymmetric multifocal intraocular lenses and photic phenomena

  • Clinical Investigation
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Abstract

Purpose

To evaluate the association between the orientation of the intermediate-vision zone and postoperative photic phenomena in eyes implanted with rotationally asymmetric multifocal intraocular lenses with + 1.5 diopters near addition.

Study design

Retrospective comparative case series.

Methods

We performed the photic phenomena test (PPT) to quantitatively evaluate photic phenomena at 1–3 months after cataract surgery with Lentis Comfort LS-313 MF15 or Lentis Comfort Toric LS-313 MF15T insertion (Oculentis; Santen Pharmaceutical). In cases of bilateral surgeries, only the right eye was included in the analysis. We also conducted a questionnaire survey about the photic phenomena.

Results

The study included 96 eyes from 96 patients. The intermediate-vision zones of 44, 19, 19, and 14 eyes were fixed in the inferior, superior, nasal, and temporal directions, respectively. The measured PPT values for halo, glare, and starburst were equivalent in all the fixed directions. Eighty-four eyes (87.5%) perceived a triangle-shaped halo, and the direction of fixation for the intermediate-vision zone and the extension direction of this photic phenomenon were consistent in 94.0% of the eyes. Less than 10% of the patients responded “moderate” or “severe” for the triangle-shaped halo, glare, and starburst in fixed directions with low frequency in the questionnaire.

Conclusion

No qualitative or quantitative difference was found in photic phenomena in eyes implanted with the LS-313 MF15 or the MF15T regardless of the fixation direction. Our study revealed that many patients were aware of a triangle-shaped halo extending in the direction of the intermediate-vision zone.

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Acknowledgements

We would like to thank Editage (www.editage.com) for English language editing.

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Correspondence to Tsuyoshi Mito.

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Conflicts of interest

T. Mito, None; Y. Ukai, None; Y. Nakatsugawa, None; T. Shibata, None; S. Shibata, None; E. Kubo, None; H. Sasaki, None.

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Corresponding Author: Tsuyoshi Mito

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Mito, T., Ukai, Y., Nakatsugawa, Y. et al. Orientation of the intermediate-vision zone of rotationally asymmetric multifocal intraocular lenses and photic phenomena. Jpn J Ophthalmol 67, 318–325 (2023). https://doi.org/10.1007/s10384-023-00988-7

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  • DOI: https://doi.org/10.1007/s10384-023-00988-7

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