![]() HOYA XY-1 is an improved version of HOYA 355 toric IOL, with the overall length 0.5 mm longer (13.0 mm vs. We conducted the current study to compare the surgical outcomes of new HOYA toric IOLs with those of other models of toric IOLs.įour models of toric IOLs were used, including AcrySof toric IOL, TECNIS toric IOL (Johnson & Johnson Vision Care, Inc., Santa Ana, CA), HOYA 355 toric IOL, and HOYA XY-1 toric IOL. These modifications are likely to affect the rotational stability of toric IOLs, but there has been no study to prove that hypothesis. ![]() Recently, HOYA modified its 355 toric IOL to be a new version, HOYA XY-1 toric IOL, by increasing the overall length, reducing the unfolding time, and introducing texture processing to the surface of haptics. Another clinical study reported relatively large degree of lens rotation associated with implantation of HOYA 355 toric IOL. A previous study demonstrated that the incidence of repositioning surgery to correct misalignment of toric IOLs was significantly higher with HOYA 355 toric IOL (HOYA, Tokyo, Japan) than with AcrySof toric IOL (Alcon Laboratories, Inc., Fort Worth, TX). On the other hand, postoperative rotational stability varies across different models of toric IOLs. Placement accuracy of a toric IOL during surgery has been significantly improved by the advent of digital image guidance systems. For the success of toric IOL implantation, placement accuracy and rotational stability are the key factors. Reduction of preexisting astigmatism at the time of cataract surgery using a toric intraocular lens (IOL) has become increasingly popular and is now regarded as the integral part of modern cataract surgery by many surgeons. This does not alter our adherence to PLOS ONE policies on sharing data and materials. Other authors have declared that no competing interests exist. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.ĭata Availability: The data underlying the results presented in the study are available from figshare, įunding: The authors received no specific funding for this work.Ĭompeting interests: Tetsuro Oshika has received research grants and speaker honorarium from Alcon, HOYA, and Johnson & Johnson Vision. Received: DecemAccepted: FebruPublished: March 1, 2021Ĭopyright: © 2021 Osawa et al. PLoS ONE 16(3):Įditor: Ahmed Awadein, Faculty of Medicine, Cairo University, EGYPT HOYA XY-1 toric IOL, the modified version of HOYA 355 toric IOL, showed excellent rotational stability in comparison with other models of toric IOLs.Ĭitation: Osawa R, Oshika T, Sano M, Yuguchi T, Kaiya T (2021) Rotational stability of modified toric intraocular lens. The proportion of eyes that showed axis misalignment <10° at 1 month postoperatively was significantly higher with HOYA XY-1 toric IOL than with other toric IOLs (χ 2 test, p = 0.020). The amount of axis misalignment from the intended axis was significantly different among IOLs (p = 0.004, one-way ANOVA), and HOYA XY-1 showed significantly less amount of axis misalignment than TECNIS (p = 0.020, Tukey’s multiple comparison) and HOYA 355 (p = 0.010). Fifty eyes received AcrySof toric IOL, 51 eyes TECNIS toric IOL, 46 eyes HOYA 355 toric IOL, and 46 eyes HOYA XY-1 toric IOL. The degree of IOL decentration, IOL tilt, and toric axis misalignment was assessed at 1 day and 1 month postoperatively. Corneal astigmatism, refractive astigmatism, and uncorrected (UDVA) and corrected distance visual acuity (CDVA) were evaluated before and 1 day, 1 week, and 1 month after surgery. Data from 193 eyes of 165 patients (76.4 ± 8.3 years old) with preoperative corneal astigmatism exceeding 0.75 diopters who had undergone phacoemulsification and toric IOL implantation were collected and analyzed. 12.5 mm), shortened unfolding time, and texture processing of the surface of haptics. We evaluated the rotational stability of a new toric intraocular lens (IOL), HOYA XY-1 toric IOL that is an improved version of HOYA 355 toric IOL, with longer overall length (13.0 mm vs.
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