Comparison of reading performance with low add bifocal and extended depth of focus intraocular lenses implanted with min
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ORIGINAL PAPER
Comparison of reading performance with low add bifocal and extended depth of focus intraocular lenses implanted with mini-monovision Semra Akkaya Turhan
. Mehmet Orkun Sevik . Ebru Toker
Received: 25 March 2020 / Accepted: 29 August 2020 Ó Springer Nature B.V. 2020
Abstract Purpose To evaluate reading performance, preferred reading distance, and spectacle independence in patients implanted with a low add multifocal or an extended depth of focus (EDOF) intraocular lens (IOL) after phacoemulsification. Methods In this prospective study, patients were randomized into two groups: the diffractive multifocal Tecnis ? 2.75 D (ZKB00) IOL (Tecnis ? 2.75 group; 15 patients) or the EDOF Tecnis Symfony (ZXR00) IOL (Symfony group; 14 patients) for bilateral implantation with mini-monovision. Reading performance parameters (reading acuity [RA], critical print size [CPS], and maximum reading speed [MRS]) were evaluated with MNREAD acuity charts at 40 cm, and preferred reading distances and spectacle independence for near activities were assessed preoperatively and at the postoperative 1st, 3rd, and 6th months. Results At the postoperative 6th month, binocular logMAR UNVA and DCNVA were significantly
better in the Symfony group than in the Tecnis ? 2.75 group (UNVA: 0.15 ± 0.07 vs. 0.22 ± 0.08, p = 0.046; DCNVA: 0.21 ± 0.05 vs. 0.28 ± 0.07, p = 0.043; respectively). There was no significant difference in reading performance parameters between the groups; however, the Symfony group preferred significantly closer reading distance than the Tecnis ? 2.75 group (42.00 ± 4.67 cm; 45.87 ± 5.32 cm, respectively, p = 0.030). At the postoperative 6th month, 14.3% and 26.7% of patients reported that they needed spectacles, rarely or occasionally, for near activities in the Symfony and Tecnis ? 2.75 groups, respectively (p [ 0.05). Conclusions When implanted with mini-monovision, although functional near visual acuity and a high degree of spectacle independence at near distances were achieved with both IOLs, patients implanted with the EDOF IOL preferred closer reading distance than those implanted with the low add diffractive multifocal IOL. Keywords Extended depth of focus Minimonovision Reading performance
S. A. Turhan (&) M. O. Sevik E. Toker Department of Ophthalmology, School of Medicine, University of Marmara, Cami mah. Ulubay sok. No: 17/6 Tuzla, Istanbul, Turkey e-mail: [email protected] M. O. Sevik e-mail: [email protected] E. Toker e-mail: [email protected]
Introduction Multifocal intraocular lenses (IOL) continue to develop to meet patients’ demands. Multifocal IOLs
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were originally designed as bifocal, which provided good distance and near vision. However, intermediate vision is crucial in modern life, considering daily activities such as computer, tablet, and mobile phone use. In particular, multifocal IOLs with the highest degrees of near add had poor intermediate vision [1–3]. Accordingly, the addition of bifocal IO
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