The impact of lens capsule diameter and capsular tension ring fit on the rota-tional stability of Toric IOLs in high myopia patients
10.13389/j.cnki.rao.2025.0125
- VernacularTitle:晶状体囊袋直径与囊袋张力环匹配度对高度近视患者Toric IOL旋转稳定性的影响
- Author:
Yanhui XU
1
;
Keqing MENG
;
Xiaojing LIU
;
Yumeng CHEN
;
Yuyu GUO
;
Jiayu LI
;
Zhimin CHEN
Author Information
1. 054000 河北省邢台市,河北省眼科医院河北省眼科重点实验室河北省眼部疾病临床医学研究中心白内障科
- Publication Type:Journal Article
- Keywords:
high myopia;
capsule-CTR fit;
Toric intraocular lens;
rotational stability
- From:
Recent Advances in Ophthalmology
2025;45(9):725-730
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the impact of lens capsule diameter and capsular tension ring(CTR)fit on the ro-tational stability and visual function of Toric intraocular lenses(IOLs)in patients with high myopia cataract after surgery,and to explore the main influencing factors.Methods A prospective study included 100 eyes of patients with high myopia(axial length≥26 mm)who underwent phacoemulsification cataract extraction combined with Toric IOL implantation at the Cataract Department of Hebei Eye Hospital from September 2023 to March 2024.Based on the ratio of the capsule equivalent diameter measured by anterior segment OCT(CASIA2)to the standard diameter of CTR,the eyes were divided into the matched group(ratio of 0.8-1.2)and the unmatched group.Follow-up was conducted at 1 week,1 month,3 months,6 months,and 12 months postoperatively to observe the rotation angle of Toric IOL,residual astigmatism,uncor-rected visual acuity,and other indicators.Safety was assessed based on intraoperative and postoperative complications.Correlation analysis and multiple linear regression were used to explore the impact of capsule-CTR fit,corneal astigmatism,axial length,and other factors on Toric IOL rotation and postoperative refractive status.Results The mean IOL rotation angle at each postoperative time point in the matched group was significantly smaller than that in the unmatched group,with statistically significant differences between groups at different time points(all P＜0.05).The matched group showed better stability in IOL decentration distance and tilt angle.At 12 months postoperatively,the residual astigmatism in the matched group was(0.53±0.29)D,which was better than that in the unmatched group(0.71±0.34)D(P=0.08).The matched group also had more significant improvement in uncorrected visual acuity and higher subjective visual quality scores.Multiple linear regression analysis showed that capsule-CTR fit and preoperative corneal astigmatism were the main independent factors affecting the rotation angle of Toric IOL(R2=0.52)and residual astigmatism(R2=0.46).Conclu-sion For patients with high myopia cataract,precise capsule-CTR matching based on CASIA2 measurement helps improve the rotational stability of Toric IOLs,reduce residual astigmatism,and enhance postoperative visual quality.Personalized CTR model selection is worth promoting and applying.
