The Effect of a Capsular Tension Ring on Decentration and Tilting of Intraocular lenses 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. METHODS: Cataract surgery was performed on both eyes of twenty patients ranging from 57 to 75 years old. Forty eyes were divided into two groups based on whether or not a CTR (Lucid Korea, Korea) was implanted. Each patient received a CTR in one eye. All IOLs (MA60BM, Acrysof R , Alcon) were implanted into the capsular bag after a continuous curvilinear capsulorhexis smaller than the optic size of the IOL, and phacoemulsification was performed. The extent of tilting and decentration of the IOLs were measured with the EAS-1000 anterior eye segment analysis system at 7, 30, and 60 days after surgery. RESULTS: IOL decentration decreased to a statistically significant extent in the eyes implanted with both IOL and CTR, versus those with IOL only. The values of CTR+IOL group were 0.38+/-0.16 mm at 7 days, 0.43+/-0.15 mm at 30 days, and 0.42+/-0.17 mm at 60 days. The IOL-only group values were 0.49+/-0.11mm at 7 days, 0.53+/-0.14 mm at 30 days, and 0.57+/-0.16 mm at 60 days. IOL tilting also decreased significantly in the IOL+CTR group compared to the IOL-only group. The CTR+IOL values were 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 IOL-only group values were 3.14+/-0.65 degrees at 7 days, 2.91+/-0.67 degrees at 30 days, and 3.06+/-0.56 degrees at 60 days. CONCLUSIONS: These results indicate that the CTR reduces undesirable post-surgical movement of the IOL for at least 60 days.