Toric intraocular lenses in eyes with with-the-rule, against-the-rule, and oblique astigmatism: One-year results

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• 作者：Yoshihiko Ninomiya ; MDAuthor Vitae ; Keiichiro Minami ; PhD ; Kazunori Miyata ; MD ; Shuichiro Eguchi ; MD ; Rie Sato ; MD ; Fumiki Okamoto ; MD ; Tetsuro Oshika ; MD ; ^{oshika@eye.ac" class="auth_mail" title="E-mail the corresponding author}
• 刊名：Journal of Cataract & Refractive Surgery
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：42
• 期：10
• 页码：1431-1440
• 全文大小：702 K

文摘

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.