Coloured lenses and the Dex frame: New issues

Abstract

Last August we introduced our readers to scotopic sensitivity syndrome, a suggested cause of dyslexia. It will be recalled that the treatment of this condition involved wearing coloured lenses or using a coloured perspex sheet to cover the page. The authors of that article found the evidence for the effectiveness of this technique far from conclusive and they urged further research.This article describes a small‐scale investigation into the same area. The Dex frame, which incorporates coloured filters, has been put to the test. At the end of a trial period the authors conclude that only a very small percentage of pupils is likely to benefit from this approach. The matter is unlikely to simply rest here if only because the debate has unearthed a whole range of visual difficulties hitherto neglected.