Yoshihiko Ninomiya1, Keiichiro Minami1, Kazunori Miyata1, Shuichiro Eguchi1, Rie Sato1, Fumiki Okamoto1, Tetsuro Oshika2. 1. From the Division of Ophthalmology (Ninomiya), Yukioka Hospital, Osaka, the Miyata Eye Hospital (Minami, Miyata), Miyazaki, the Eguchi Eye Hospital (Eguchi), Hokkaido, and the Department of Ophthalmology (Sato, Okamoto, Oshika), Faculty of Medicine, University of Tsukuba, Ibaraki, Japan. 2. From the Division of Ophthalmology (Ninomiya), Yukioka Hospital, Osaka, the Miyata Eye Hospital (Minami, Miyata), Miyazaki, the Eguchi Eye Hospital (Eguchi), Hokkaido, and the Department of Ophthalmology (Sato, Okamoto, Oshika), Faculty of Medicine, University of Tsukuba, Ibaraki, Japan. Electronic address: oshika@eye.ac.
Abstract
PURPOSE: To assess 1-year clinical results of toric intraocular lenses (IOLs) in eyes having with-the-rule (WTR), against-the-rule (ATR), or oblique corneal astigmatism. SETTING: Four ophthalmic surgical sites, Japan. DESIGN: Prospective case series. METHODS: One of 3 toric IOLs or 1 nontoric IOL was implanted in eyes having phacoemulsification and IOL implantation. RESULTS: The study comprised 218 eyes (155 patients). Based on the suggestion of an online toric calculator with anterior corneal curvature data, 63 eyes received the SN6AT3 IOL with a cylinder power of 1.50 diopters [D] at IOL plane (1.50 D cylinder IOL) 55 eyes the SN6AT4 IOL with a cylinder power of 2.25 D at IOL plane (2.25 D cylinder IOL), and 58 eyes the SN6AT5 IOL with a cylinder power of 3.00 D at IOL plane (3.00 D cylinder IOL) (all Acrysof IQ toric), and 42 eyes received the SN60WF IOL (nontoric IOL). One hundred ninety-four eyes (89.0%) completed 1-year of follow-up. The centroid error in predicted residual astigmatism calculated using vector analysis was close to the origin in eyes with WTR astigmatism (0.17 diopter [D] @ 174.9 ± 0.54 D), while those with ATR and oblique astigmatism were significantly shifted toward the ATR direction (P < .001). The distance from the origin was significantly smaller in the WTR group than in ATR and oblique groups (P < .05). The centroid errors were shifted toward ATR in all toric IOL groups (P < .001); however, the distance from the origin was not different between groups (P = .52). Postoperatively, the mean absolute misalignment of the IOLs was 5.92 degrees ± 5.59 (SD) at 1 day and 6.24 ± 5.87 degrees at 1 year. The results of other clinical parameters were excellent, with no significant differences between astigmatism categories or IOL models. CONCLUSION: Based on anterior corneal curvature alone, toric IOLs undercorrected ATR and oblique astigmatism; however, 1-year clinical results of toric IOLs were highly stable and satisfactory. FINANCIAL DISCLOSURE: None of the authors has a financial or proprietary interest in any material or method mentioned.
PURPOSE: To assess 1-year clinical results of toric intraocular lenses (IOLs) in eyes having with-the-rule (WTR), against-the-rule (ATR), or oblique corneal astigmatism. SETTING: Four ophthalmic surgical sites, Japan. DESIGN: Prospective case series. METHODS: One of 3 toric IOLs or 1 nontoric IOL was implanted in eyes having phacoemulsification and IOL implantation. RESULTS: The study comprised 218 eyes (155 patients). Based on the suggestion of an online toric calculator with anterior corneal curvature data, 63 eyes received the SN6AT3 IOL with a cylinder power of 1.50 diopters [D] at IOL plane (1.50 D cylinder IOL) 55 eyes the SN6AT4 IOL with a cylinder power of 2.25 D at IOL plane (2.25 D cylinder IOL), and 58 eyes the SN6AT5 IOL with a cylinder power of 3.00 D at IOL plane (3.00 D cylinder IOL) (all Acrysof IQ toric), and 42 eyes received the SN60WF IOL (nontoric IOL). One hundred ninety-four eyes (89.0%) completed 1-year of follow-up. The centroid error in predicted residual astigmatism calculated using vector analysis was close to the origin in eyes with WTR astigmatism (0.17 diopter [D] @ 174.9 ± 0.54 D), while those with ATR and oblique astigmatism were significantly shifted toward the ATR direction (P < .001). The distance from the origin was significantly smaller in the WTR group than in ATR and oblique groups (P < .05). The centroid errors were shifted toward ATR in all toric IOL groups (P < .001); however, the distance from the origin was not different between groups (P = .52). Postoperatively, the mean absolute misalignment of the IOLs was 5.92 degrees ± 5.59 (SD) at 1 day and 6.24 ± 5.87 degrees at 1 year. The results of other clinical parameters were excellent, with no significant differences between astigmatism categories or IOL models. CONCLUSION: Based on anterior corneal curvature alone, toric IOLs undercorrected ATR and oblique astigmatism; however, 1-year clinical results of toric IOLs were highly stable and satisfactory. FINANCIAL DISCLOSURE: None of the authors has a financial or proprietary interest in any material or method mentioned.
Authors: Ladislav Viktor Nováček; Marie Němcová; Kristýna Sičová; Kateřina Tyx; Pavel Rozsíval; Jan Němčanský; Pavel Studený Journal: J Clin Med Date: 2022-07-19 Impact factor: 4.964