From the Eguchi Eye Hospital, Hokkaido, Japan (Sasaki, Eguchi); Miyata Eye Clinic, Hiroshima, Japan (Akira Miyata); Mikawa Eye Clinic, Saga, Japan (Nishimura); Miyata Eye Hospital, Miyazaki, Japan (Kazunori Miyata); Department of Ophthalmology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan (Hasegawa, Oshika).
J Cataract Refract Surg. 2021 May 1;47(5):618-621. doi: 10.1097/j.jcrs.0000000000000489.
To investigate factors related to the rotational stability of an acrylic toric intraocular lens (IOL).
Four ophthalmic surgical sites in Japan.
Prospective case series.
The study included 120 eyes of 120 patients undergoing phacoemulsification and implantation of a toric IOL (AcrySof IQ, Alcon Laboratories, Inc.). At 1 hour postoperatively, the area of continuous curvilinear capsulorhexis (CCC) was measured, and the state of anterior capsule coverage on the IOL optic (total on or partial on) was recorded. The toric IOL axis orientation was assessed at the end of surgery and at 1 hour, 1 week, 1 month, and 6 months postoperatively. Multiple regression analysis was performed to explore any clinical factors relevant to IOL rotation from the end of surgery to 6 months postoperatively. The explanatory variables included age, anterior chamber depth preoperatively, axial length, type of corneal astigmatism (with-the-rule, against-the-rule, or oblique astigmatism), area of CCC, state of anterior capsule overlap on IOL optic (total coverage vs partial coverage), and surgical sites (surgeons).
The multiple regression analysis in 110 eyes of 110 patients indicated that anterior capsule overlap on the IOL optic was the only variable associated with IOL rotation at 6 months postoperatively (P = .0482). The mean absolute rotation at 6 months was 1.96 ± 1.81 degrees in the total on group and 3.79 ± 3.12 degrees in the partial on group (P = .0004).
Rotational stability of a single-piece, acrylic toric IOL was better in eyes with total anterior capsule coverage than that in those with partial anterior capsule coverage on the IOL optic.
研究与丙烯酸散光人工晶状体（IOL）旋转稳定性相关的因素。
日本的四个眼科手术地点。
前瞻性病例系列。
该研究纳入了 120 例（120 只眼）接受白内障超声乳化吸除术和散光 IOL（AcrySof IQ，Alcon Laboratories，Inc.）植入术的患者。术后 1 小时，测量连续环形撕囊（CCC）的面积，并记录 IOL 光学部前囊膜覆盖情况（完全覆盖或部分覆盖）。在手术结束时和术后 1 小时、1 周、1 个月和 6 个月评估散光 IOL 轴位方向。采用多元回归分析，从手术结束到术后 6 个月，探讨与 IOL 旋转相关的任何临床因素。解释变量包括年龄、术前前房深度、眼轴长度、角膜散光类型（顺规、逆规或斜轴散光）、CCC 面积、IOL 光学部前囊膜重叠情况（完全覆盖或部分覆盖）以及手术地点（手术医生）。
在 110 例（110 只眼）患者的 110 只眼中进行的多元回归分析表明，IOL 光学部前囊膜重叠是术后 6 个月时与 IOL 旋转相关的唯一变量（P =.0482）。完全覆盖组术后 6 个月的平均绝对旋转为 1.96 ± 1.81 度，部分覆盖组为 3.79 ± 3.12 度（P =.0004）。
在 IOL 光学部完全覆盖前囊膜的眼中，与部分覆盖相比，单片丙烯酸散光 IOL 的旋转稳定性更好。
