Effect of light filters on reading speed in normal and low vision due to age-related macular degeneration

Abstract

Purpose: To investigate the effects of light filters on reading speed in normal and low vision due to age-related macular degeneration (AMD). Methods: Reading speed was determined for 12 subjects with normal vision and 12 subjects with non-exudative AMD using stationary lowercase nonsensical print in Times Roman font and four light filters; a yellow Corning Photochromic Filter (CPF) 450, a grey neural density (ND) filter, an individual filter obtained using the Intuitive Colorimeter® and a clear filter. Results: There was no statistically significant light filter effect on reading speed for the normal subjects. The AMD group demonstrated a statistically significant 5% average improvement in reading speed with the CPF450 compared with the other filters although some AMD subjects had improvements of 10-15%. Conclusions: Light filters obtained using the Intuitive Colorimeter® performed poorly when compared with the CPF450, ND and clear filters for both the study groups. For the AMD group, average reading speed was statistically greater with the CPF450 than the other filters, however it is questionable whether the improvement (5%) would be clinically significant. As some of the subjects with AMD had greater improvements with the CPF450 we advocate clinical assessment of light filters using existing protocols on an individual basis. © 2004 The College of Optometrists.

Publication DOI: https://doi.org/10.1046/j.1475-1313.2003.00157.x
Divisions: College of Health & Life Sciences > School of Optometry > Optometry
College of Health & Life Sciences > School of Optometry > Optometry & Vision Science Research Group (OVSRG)
College of Health & Life Sciences
College of Health & Life Sciences > School of Optometry > Vision, Hearing and Language
Additional Information: © 2004 The College of Optometrists. Published by Wiley-Blackwell.
Uncontrolled Keywords: age-related macular degeneration,CPF450,intuitive colorimeter®,light filters,Ophthalmology,Sensory Systems,Health Professions(all)
Publication ISSN: 1475-1313
Last Modified: 16 Jan 2024 08:03
Date Deposited: 16 Mar 2010 14:38
Full Text Link:
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
http://onlineli ... 0157.x/abstract (Publisher URL)
PURE Output Type: Article
Published Date: 2003-12-22
Authors: Eperjesi, Frank (ORCID Profile 0000-0003-4358-0095)
Fowler, Colin W.
Evans, B.J.W.

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