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Updated: Nov 2, 2025

Measuring the Behavioral Effects of Intraocular Scatter
Published on: February 18, 2021
Visual performance after the deterioration of retinal image quality: induced forward scattering using Bangerter foils
José J Castro-Torres1, Francesco Martino1, Miriam Casares-López1
1Laboratory of Vision Sciences and Applications, Department of Optics, University of Granada, 18071 Granada, Spain.
Abstract:
We induced and evaluated different levels of retinal-image degradation using Bangerter foils and fog filters. We found increased straylight and an important deterioration in visual performance, assessed by means of visual acuity, contrast threshold, and visual discrimination capacity. Bangerter foils induced forward scattering levels comparable to those observed in mature to severe cataracts, with an important impact of halos and starbursts. Fog filters induced lower levels of intraocular scattering, although luminous veils and circular halos were reported. The visual disturbance index positively correlated with intraocular scattering and straylight. Our results show retinal-image quality has an important influence on night-vision performance.
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