Evaluation of Accommodating Potency of the Accommodative Intraocular Lens by Change of Anterior Chamber Depth

ABSTRACT

PURPOSE: To investigate the accommodating potency of the 1CU accommodative posterior chamber intraocular lens (PC IOL), according to pilocarpine-induced ciliary muscle contraction, near visual acuity, and distance-corrected near visual acuity after implantation of the IOL. METHODS: In a prospective study, 9 eyes of 7 patients (mean age 48+/-14.9 years [range 23 to 71 years]) had phacoemulsification and PC IOL (1CU(R), Humanoptics). Distance refraction, distance visual acuity (VA), distance-corrected VA (DCVA), near visual acuity (NVA), and distance-corrected near visual acuity (DCNVA) were determined at 2 week, 1, 2, 6, and 12 months after surgery. Anterior chamber depth (ACD) was measured 3 times with the Orbscan(R) (Orbtek, U.S.A.), and averaged. Then ACD was repeatedly measured within 90 minutes after administration of pilocarpine 2% eyedrops 3 times at 10 minutes interval. RESULTS At 2 weeks, 1, 2, 6 and 12 months after surgery, the mean DCNVA was 0.55+/-0.23, 0.37+/-0.14, 0.40+/-0.22, 0.51+/-0.20, and 0.56+/-0.20, respectively. The mean ACD decrease (mm) was 0.57+/-0.77, 0.91+/-0.69, 0.17+/-0.45, 0.35+/-0.40 and 0.59+/-0.31, respectively, using Orbscan(R) after pilocarpine 2% eyedrops. There was statistically significant correlation between the pilocarpine-induced IOL movement and DCNVA (r=0.439, P=0.012). CONCLUSIONS: 1CU accommodative PC IOL provided relatively good DCNVA and accommodating potency for up to 1 year. It is necessary to investigate accommodative change for a longer time period.