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The effect of posterior capsule opacification on visual function.

William R Meacock·David J Spalton·James Boyce·John Marshall
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Abstract

PURPOSE: To investigate how posterior capsule opacification (PCO) affects visual function in pseudophakic eyes. METHODS: One hundred and six eyes that had undergone uncomplicated phacoemulsification were recruited sequentially. Patients with surgical complications or other ocular disease were excluded. PCO was assessed by a digital retroillumination camera using a software program based on the analysis of texture in the image, and the percentage area within the central 3-mm zone of the posterior capsule was calculated. Visual function assessment included Early Treatment Diabetic Retinopathy Study (ETDRS) high- and low-contrast visual acuity, contrast sensitivity with the Pelli-Robson and CSV-1000 grating charts, and forward light-scatter by the direct-compensation method (van den Berg). RESULTS: The percentage PCO required for decline in high-contrast ETDRS was 78%; for low-contrast acuity and Pelli-Robson, 46%; for CSV-1000 contrast sensitivity, 38% to 51%; and for forward light-scatter, less than 1% PCO. CONCLUSIONS: Central PCO affects psychophysical test results with differing degrees of sensitivity. Forward light-scatter is the most sensitive, followed by contrast sensitivity and visual acuity.

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AgedAged, 80 and overCataractContrast SensitivityFemaleHumansLens Capsule, CrystallineLens Implantation, IntraocularLightMaleMiddle AgedPhacoemulsificationPostoperative ComplicationsPseudophakiaPsychophysicsScattering, RadiationVision DisordersVisual AcuityJournal ArticleResearch Support, Non-U.S. Gov't

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William R Meacock, David J Spalton, James Boyce, John Marshall. 2003. The effect of posterior capsule opacification on visual function.. https://doi.org/10.1167/iovs.02-0634

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