Functional assessment of two different accommodative intraocular lenses compared with a monofocal intraocular lens

PURPOSE: To evaluate selected functional and physical properties of 2 models of accommodative intraocular lenses (IOLs) compared with those of a standard monofocal IOL. DESIGN: Prospective randomized comparative trial. PARTICIPANTS: Subjects were divided into 3 groups. In group 1, 30 eyes (19 subjects) received 1CU IOL implantation; in group 2, 29 eyes (19 subjects) received AT-45 IOL implantation; and in group 3, 21 eyes (21 subjects) were implanted with a monofocal IOL as a control. INTERVENTION: Cataract surgery with implantation of the 1CU and AT-45 accommodative IOL models in the study groups, and the ACR6D monofocal IOL in the control group. MAIN OUTCOME MEASURES: Far and near distance visual parameters were assessed at 1, 6, and 12 months after surgery in the accommodative IOL groups, and at 1 and 12 months in the control group. Anterior segment anatomy was investigated by ultrasound biomicroscopy, with and without visual accommodative stimulation. RESULTS: The accommodative IOL groups significantly differed from the controls in terms of lower near-distance refractive addition (NDRA) and better distance-corrected near visual acuity (DCNVA), with P<0.001 at 1 year. The anterior IOL displacement during accommodation (DeltaACD) was significantly larger in the study groups, and this correlated with DCNVA. Until 6 months, the DeltaACD correlated with the solicited sclerociliary process rotation only in the study groups. CONCLUSION: This 12-month study demonstrated that the accommodating IOLs achieved better clinical results than the monofocal IOL in terms of DCNVA and NDRA. These results support the hypothesis that accommodative IOLs proportionally react to ciliary body rotation, although this relationship became less evident at 12 months.