Effect of a capsular tension ring on intraocular lens decentration and tilting after cataract surgery

Abstract

Purpose: To evaluate the effect of a capsular tension ring (CTR) on the tilting and decentration of intraocular lenses (IOLs) after cataract surgery.Setting: Department of Ophthalmology, Ilsan Paik Hospital, Inje University, Kyunggyi-do, Korea.Methods: Cataract surgery was performed in both eyes of 20 patients ranging in age from 57 to 75 years. The 40 eyes were divided into 2 groups based on whether a CTR (Lucid Korea) was implanted. Each patient received a CTR in 1 eye only. All IOLs (AcrySof® MA60BM, Alcon) were implanted in the capsular bag after a continuous curvilinear capsulorhexis smaller than the IOL optic was created and phacoemulsification performed. The extent of IOL tilting and decentration was measured with the EAS-1000 anterior eye segment analysis system 7, 30, and 60 days after surgery.Results: The extent of IOL decentration was statistically significantly less in eyes with both an IOL and CTR than in those with an IOL only. The mean decentration in the CTR-IOL group was 0.38 mm ± 0.16 (SD) at 7 days, 0.43 ± 0.15 mm at 30 days, and 0.42 ± 0.17 mm at 60 days. The mean values in the IOL-only group were 0.49 ± 0.11 mm, 0.53 ± 0.14 mm, and 0.57 ± 0.16 mm, respectively. The amount of IOL tilting was also significantly less in the CTR-IOL group. The mean tilting in the CTR-IOL group was 2.22 ± 0.46 degrees at 7 days, 2.36 ± 0.50 degrees at 30 days, and 2.47 ± 0.40 degrees at 60 days. The mean values in the IOL-only group were 3.14 ± 0.65 degrees, 2.91 ± 0.67 degrees, and 3.06 ± 0.56 degrees, respectively.Conclusion: These results indicate that the CTR reduces undesirable postsurgical IOL movement for at least 60 days.