Previous studies of visually symptomatic dyslexics have found that their contrast thresholds for pattern discrimination are the same as non-dyslexics. However, when noise is added to the stimuli, contrast thresholds rise markedly in dyslexics compared with non-dyslexics. This result could be due to impaired noise exclusion in dyslexics. Some…

We measured the increase in reading speed afforded by two currently available systems of coloured overlays: the "Intuitive Overlays," which provide a choice of 30 colours, and the "Eye Level Reading Rulers," which provide a choice of 5. Forty-eight pupils from a local authority primary school who reported experiencing symptoms of visual stress…

States that 46 children aged 12-16 were shown a page of meaningless text covered with plastic overlays, including 7 that were various colors and 1 that was clear. Explains that each child selected the overlay that made reading easiest. Notes that children who read with a colored overlay complained of visual discomfort when they read without the…