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Effect of capsular bend on the rotational stability of toric intraocular lens

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First Author: Z.Yun-e CHINA

Co Author(s):    Z. Yun-e   C. Pingjun   C. Dongjie              

Abstract Details

Purpose:

To assess the effect of capsular bend and axial length on the rotational stability of toric IOL.

Setting:

The Eye Hospital of Wenzhou Medical University, Hangzhou, China

Methods:

The prospective study included patients with preexisting astigmatism that were implanted with Acrysof IQ Toric IOL. According to the pre operative axial length, all patients were divided into 2 groups: high myopia(AL＞26mm) group, and emmetropia or low myopia group(22mm＜AL＜24.5mm). High-speed Swept-source Optical Coherence Tomography (SS-OCT) radial scanning was performed after pupil dilation to obtain the toric IOL axial orientation and capsular bending index (CBI) at 1-day, 1-week, 1-month and 3-month intervals postoperatively. The correlation between the rotation of toric intraocular lens and the axial length or CBI was subsequently analyzed.

Results:

56 eyes were included in the research, among them, 47 eyes were seen 3-months postoperatively. The rotation of toric IOL within the high myopia group was greater than the control group (P = 0.008). There was a positive correlation between the degree of rotation and axial length at the interval found between 1-week and 1-month after operation (r = 0.319, P = 0.017). There was a significant negative correlation between the IOL rotational speed and CBI (P ＜ 0.001). The regression equation was Y= -0.468 * X + 1.869 (R ² = 0.3, P ＜ 0.001).

Conclusions:

There was a significant negative correlation between the IOL rotation speed and the CBI, while the influence of the axial length and capsular bending mainly occurred between one week and one month after the operation.

Financial Disclosure:

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