To assess the visual performance of extended depth of focus (EDF) contact lenses (CL) in eyes that had undergone monofocal intraocular lens (IOL) implantation, and compare that between EDF and single-vision (SV) contact lenses.
Prospective, randomized, crossover study
Seventeen patients implanted with monofocal IOLs were enrolled. The study was conducted using 1dayPure EDOF as a test CL and 1dayPure moisture (both SEED Co., Ltd.) as a control CL. Binocular visual acuity from far to near distances, photopic and mesopic contrast sensitivity (with and without glare), and stereopsis were evaluated after wearing the two kinds of CLs in random order. The obtained results were compared between the EDF and SV CLs.
Binocular visual acuity at 0.3, 0.4, 0.7, 1, and 5 m was 0.24 ± 0.12, 0.07 ± 0.09, − 0.02 ± 0.08, − 0.02 ± 0.08, and − 0.06 ± 0.07 logMAR during the EDF CL wear, respectively, and 0.39 ± 0.17, 0.26 ± 0.15, 0.04 ± 0.12, − 0.02 ± 0.08, and − 0.09 ± 0.09 during the SV CL wear, respectively. The EDF CL showed better results than the SV CL at 0.3, 0.4, and 0.7 m (p < 0.05). There were no significant differences in contrast sensitivity between the EDF and SV CLs at 1.5 cycles per degree under all conditions; however, the sensitivity of the EDF CL was generally worse than that of the SV CL from the middle to high spatial frequencies. Stereopsis at 40 cm was significantly better in the EDF CL wear than in the SV CL wear (p < 0.05).
The EDF CL substantially improved visual acuity at near to intermediate distances in IOL-implanted eyes. However, far visual acuity decreased under low-contrast conditions, and contrast sensitivity slightly declined at the middle to high spatial frequencies.
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This research was supported in part by an unrestricted investigator-initiated grant from SEED Co. Ltd. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Conflicts of interest
Sponsorship and article processing charges for this study were funded by SEED Co., Ltd., Tokyo, Japan. None of the authors has a financial or proprietary interest in any material or method mentioned.
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Corresponding author: Takahiro Hiraoka
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Hiraoka, T., Kiuchi, G., Hiraoka, R. et al. Comparison of visual performance between extended depth of focus contact lens and single-vision contact lens in eyes with monofocal intraocular lens. Jpn J Ophthalmol (2021). https://doi.org/10.1007/s10384-021-00862-4
- Extended depth of focus
- Contact lens
- Monofocal intraocular lens
- Binocular visual acuity
- Contrast sensitivity