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. 2020 Mar;34(3):474-479.
doi: 10.1038/s41433-019-0521-0. Epub 2019 Jul 12.

Early Postoperative Rotational stability and its related factors of a single-piece acrylic toric intraocular lens

Shuyi Li  1   2 , Xi Li  3 , Suhong He  4 , Qianyin Zheng  5 , Xiang Chen  1 , Xingdi Wu  1 , Wen Xu  6
Affiliations

Early Postoperative Rotational stability and its related factors of a single-piece acrylic toric intraocular lens

Shuyi Li et al. Eye (Lond). 2020 Mar.

Abstract

Purpose: In the present study, we aimed to evaluate the early postoperative rotational stability of TECNIS toric intraocular lens (IOL) and analyse its correlation with preoperative and intraoperative parameters.

Methods: A total of 102 eyes from 87 cataract patients who underwent implantation of TECNIS toric IOL during July 2016 to November 2017 were enrolled in this retrospective study. Preoperative parameters including corneal astigmatism, axial length (AL), lens thickness (LT), anterior chamber depth (ACD) and sulcus-to-sulcus (STS), were determined. The area of capsulorhexis was measured with Rhinoceros 5.0 software. The follow-up examinations including the residual astigmatism (RAS) and postoperative toric IOL axis, were performed at 1 month and 3 months after surgery.

Results: RAS was -0.84 ± 0.88 D at 1 month and -0.81 ± 0.89 D at 3 months after surgery. The rotation of toric IOL at 3 months was 4.83 ± 3.65°. The Pearson's r of ACD, horizontal and vertical STS, and toric IOL target axis was 0.011, 0.039, 0.045 and 0.082. The toric IOL rotation was positively correlated with the area of capsulorhexis (r = 0.522, P = 0.0003), LT (r = 0.288, P = 0.003) and AL (r = 0.259, P = 0.009). As for the area of capsulorhexis, the regressive equation was: y = 0.682 × -13.105, demonstrating that the diameter of capsulorhexis should be controlled within 5.8 mm to maintain the toric IOL rotation within 5.0°.

Conclusions: TECNIS toric IOLs possessed great early postoperative rotational stability. The area of capsulorhexis, AL and LT were positively correlated with postoperative rotational stability. A capsulorhexis within 5.8 mm had an important significance in improving rotational stability.

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Conflict of interest statement

The authors declare that they have no conflict of interest.

Figures

Fig. 1
Fig. 1
Photograph showing the area of the capsulorhexis after inserting toric IOL calculated by Rhinoceros V.5.0. After importing the image of surgery into Rhinoceros and adjusting to the precise size, the area of capsulorhexis was measured by drawing the line of capsulorhexis. The area of capsulorhexis of this patient was 26.16 mm2
Fig. 2
Fig. 2
Toric IOL rotation was significantly and positively correlated with the area of capsulorhexis (Pearson’s r = 0.522, P = 0.0003). IOL intraocular lens
See this image and copyright information in PMC

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