Assorted Coloured Overlays A4 10pk offers a thoughtfully designed, durable resource for hands-on learning. A solution to visual stress problems that often occur alongside dyslexia. Really simple to use, just remove from packaging, place over text and read. Coloured overlays can increase reading speed by 25% or more for people who suffer from visual stress. The overlays have a shiny side and a matt side to provide improved usability over a range of lighting conditions. Reading from the shiny side gives a subjectively crisper appearance to the underlying text, but can reflect overhead lighting. The matt side trades slightly decreased clarity for less reflection.