1. Figure/background, brightness/contrast and reading disabilities;Meares O.;Visible Lang,1980
2. Irlen H. Reading by the colors: overcoming dyslexia and other reading disabilities through the Irlen method. Garden City Park (NY): Avery Publishing Group; 1991.
3. Wilkins A. Reading through colour: how coloured filters can reduce reading difficulty, eye strain and headaches. Chichester: Wiley; 2003.
4. The effect of coloured overlays and lenses on reading: a systematic review of the literature
5. Albon E, Adi Y, Hyde C. The effectiveness and cost-effectiveness of coloured filters for reading disability: a systematic review. Birmingham: Department of Public Health and Epidemiology, University of Birmingham; 2008.