Capsular tension ring as protective measure against in-the-bag dislocations after cataract surgery.

PURPOSE: To assess the influence of capsular tension ring (CTR) implantation on the development of in-the-bag (ITB) dislocations after cataract surgery.

SETTING

Department of Ophthalmology Graz, Graz, Austria.

DESIGN

Single-center, retrospective cohort study.

METHODS

The medical records of patients who underwent cataract operation between 1996 and 2017 were analyzed. Cox proportional hazards regression analysis was used to assess the influence of CTR implantation and other predisposing factors (pseudoexfoliation [PEX], age, retinitis pigmentosa, sex, zonular weakness, uveitis, high myopia, and intraocular lens design and material) on ITB dislocations.

RESULTS

ITB dislocations were found in 111 (0.16%) of 68199 eyes (46 632 patients). In the multivariate analysis adjusted for other predisposing risk factors, a CTR implantation was associated with a lower risk of an ITB dislocation (hazard ratio [HR], 0.29; 95% CI, 0.11-0.80; P = .017). In eyes with PEX, a CTR implantation was associated with an HR of 0.16 (95% CI, 0.04-0.70; P = .015), whereas eyes without PEX had an HR of 0.80 (95% CI, 0.14-4.41; P = .793). A CTR implantation in eyes with zonular weakness resulted in a potentially lower risk (HR, 0.37; 95% CI, 0.12-1.12; P = .078).

CONCLUSIONS

According to the dataset, implantation of a CTR was a protective measure against an ITB dislocation. Especially in patients with zonular weakness and PEX, the CTR implantation was association with a lower risk of ITB dislocations. In patients without PEX, no association was established.