Improved functional vision with a modified prolate intraocular lens.

Mark Packer; I Howard Fine; Richard S Hoffman; Patricia A Piers

doi:10.1016/j.jcrs.2003.10.022

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Improved functional vision with a modified prolate intraocular lens.

Mark Packer·I Howard Fine·Richard S Hoffman·Patricia A Piers

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Abstract

PURPOSE: To evaluate whether the Tecnis Z9000 intraocular lens (IOL) (Pfizer) with a modified prolate anterior surface provides better quality of vision than a conventional spherical IOL. SETTING: Oregon Eye Institute, Eugene, Oregon, USA. METHODS: Patients presenting for cataract surgery who were randomly assigned to receive a Tecnis Z9000 IOL (Pfizer) or a Sensar OptiEdge AR40e IOL (AMO) in 1 eye were followed for 3 months postoperatively. The patient could elect to have the same type of IOL implanted in the fellow eye. The results of sine-wave grating contrast sensitivity testing under mesopic and photopic conditions were compared interindividually. RESULTS: Monocular comparison was made between the 2 IOL groups, which comprised 15 patients each. The Tecnis IOL provided significantly better contrast sensitivity at 6 cycles per degree (cpd) under photopic conditions and at 1.5 and 3 cpd under mesopic conditions. Seven patients with a Tecnis IOL and 9 patients with an AR40e IOL had subsequent implantation in the fellow eye. In all eyes, including fellow eyes, having IOL implantation, the Tecnis provided significantly better contrast sensitivity at 3 and 6 cpd under photopic conditions and at 1.5, 3, and 6 cpd under mesopic conditions. The mean contrast sensitivity in fellow eyes showed that the Tecnis IOL produced significantly better results at some spatial frequencies. CONCLUSIONS: Results show the Tecnis IOL with a modified prolate anterior surface may produce better contrast sensitivity than a standard spherical IOL under mesopic and photopic conditions. Because contrast sensitivity testing correlates well with functional vision, a goal of future research should be to evaluate patient performance using functional tests such as driving simulation.

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Aged Aged, 80 and over Cataract Extraction Contrast Sensitivity Follow-Up Studies Humans Lens Implantation, Intraocular Lenses, Intraocular Middle Aged Prosthesis Design Quality of Life Vision, Ocular Clinical Trial Comparative Study Journal Article Randomized Controlled Trial Research Support, Non-U.S. Gov't

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Mark Packer, I Howard Fine, Richard S Hoffman, Patricia A Piers. 2004. Improved functional vision with a modified prolate intraocular lens.. https://doi.org/10.1016/j.jcrs.2003.10.022

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