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For the first time in my life I could see text clear as glass. "It was the most important moment of my life. A Coloured Overlay made all the difference In many cases it can be remedied by a very simple and inexpensive intervention: reading through a coloured overlay that changes the colour of the page. This condition is a visual-perceptual disorder variously called Meares-Irlen Syndrome, Scotopic Sensitivity, visual stress or simply Visual Dyslexia. However there are many cases when a child who has been identified as, say, dyslexic, experiences reading problems that are not in fact a consequence of those "dyslexic" difficulties that are usually identified with reference to a phonological processing deficit, but which result from an entirely separate (although often co-occurring) condition which, because it exists alongside the dyslexia, dyspraxia, ADD/HD or autism, can either be masked by it and therefore not addressed as a separate issue, or confused with it with the result that other aspects of the disability may be neglected. These disabilities are often, and correctly, attributed to the processing problems that have been identified as part of their condition. Many children with specific learning difficulties such as dyslexia and autistic spectrum disorders have obvious difficulties with reading and writing that impair their performance in the classroom. For schools, the visual stress assessment pack can quickly screen struggling readers to discover if an overlay or reading ruler could help.To see if reading through colour works for you, just get a mixed pack of ten reading rulers or page overlays and try them out.This set of difficulties is sometimes called "visual dyslexia," but it is not actually dyslexia. Visual Stress can exist on its own or alongside other dyslexia-related difficulties and other SpLDs.If you filter out the problem wavelength with someone who has this sensitivity the text becomes clearer, and headaches and migraines can be reduced.About 30% of the population are uncomfortable with black text on white backgrounds because their visual cortex is oversensitive to certain wavelengths.A quick summary of Visual Stress (sometimes called Irlen Syndrome, Meares-Irlen Syndrome, Scotopic Sensitivity, Visual Stress or Visual Dyslexia)