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ChromaGen: ChromaGen lenses are designed to help with visual processing issues related to dyslexia. They use coloured filters to modify the wavelength of light entering the eye, which may help improve reading ability for some individuals. Symptoms such as these have a variety of different causes, some of which may be due to disease or abnormality, so they must be investigated by a professional who is qualified to diagnose them correctly and give appropriate treatment. Anyone who experiences such difficulties associated with reading should consult a registered optometrist for a full assessment of eye health and visual function.
The children tend to lose their self-confidence. Because literacy is so important in the modern world, they often face a life of failure and depression. Or their anger and frustration with the world may lead them into aggression and crime. Yet if they survive their schooling, many dyslexics can become remarkably successful. The best way to know whether using a blue overlay for reading (or some other color) could help make reading easier and more comfortable for you is to start with a self-test. Sometimes called a scotopic sensitivity syndrome test, our self-test will let you know if the issues you are experiencing are related to the specific type of visual processing problem that colored overlays can help. Remember, colored overlays for reading are not a solution for all reading problems, only those that are caused by the brain’s inability to process light efficiently. Colored Overlays for DyslexiaVisual dyslexia needs to be objectively observed. Most sufferers are not aware that their experience of reading differs from that of other people. Fortunately, behaviour associated with visual stress can be quite easy to spot. Contrary to the coloured lenses research that was conducted in 1999, coloured overlays can be looked upon as controversial. This is because, in an experiment conducted where some participants were asked to read text without an overlay and then with an overlay, there was no significant difference between the reading speeds for either method. For example, Emily, aged 7 when the experiment took place, had a reading speed of 49 correct words per minute (CWPM) without an overlay and 48 CWPM with the overlay. The overlays being referred to as dyslexia overlays can also be considered controversial because they do not only help people with dyslexia, but they can also be beneficial for people with dyspraxia and AD(H)D. What Colour Overlay is Best for Dyslexia? Colored overlays are most effective for individuals whose difficulties are isolated to reading. If you experience challenges with writing, math, depth perception, night driving, or the environment, colored filters (worn as glasses) will be your best treatment option. However, colored overlays are an important first step in determining whether the Irlen Method can work for you and provide your first experience with relief. Some orthoptic departments may also undertake coloured overlay testing. A few have an Intuitive Colorimeter.
In our view, children should be free to wear the glasses if they find it helpful to do so, but not encouraged to wear them if they would not otherwise do so. The response to colour is subjective and individual, and the wearer is the best person to judge whether there is any benefit. If you filter out the problem wavelength with someone who has this sensitivity the text becomes clearer, and headaches and migraines can be reduced. The examiner should listen to the client's description of the distortions, and use this description when trying to decide whether a particular colour the reduces distortions. The children who benefit may be good readers, but more often they have difficulty reading. They usually suffer visual discomfort when reading and, when questioned, will often report perceptual distortions of the text. These distortions usually include apparent movement or blurring of the letters and words. Often there is a family history of migraine. In 1999, British scientists carried out clinical trials that “found that coloured lenses could help people with visual dyslexia.” 400 children participated in the most recent study where “90% reported a significant improvement in reading, writing and comprehension skills” whilst wearing the coloured lenses. Over the 6-month assessment period, the children showed a minimum improvement rate of 45% for their reading, writing and comprehension skills. How Do Coloured Overlays for Dyslexia Work?It is essential to realise that the appropriate colour for use in glasses is not the same as that in overlays 5. For example, a child may choose a yellow overlay and benefit from blue lenses. The colour of the lenses can only be assessed by optometrists or orthoptists who use the Intuitive Colorimeter 0, or by the use of a very large number of coloured trial lenses. Other methods of selecting coloured lenses may be less likely to select the optimal colour. The NHS pays optometrists a small fee for carrying out a basic eye examination. As the tests listed above are of a specialist nature most optometrists have to charge a private fee for the detailed investigation of people with reading difficulties. The effectiveness of dyslexia glasses and lenses can vary from person to person, as dyslexia is a complex condition with individual differences. Blue light therapy has also been shown to help people with sleeping problems, to improve alertness during night shift work and to help overcome jet lag. This probably also works on the suprachiasmatic nucleus to alter the timing of diurnal rhythms. We found that children whose reading benefitted from wearing blue filters during the day also often reported that their sleeping patterns had improved, and we showed that this was probably due to an effect on the SCN; at night secretion of the sleep hormone, melatonin, which is also under the control of the SCN, can be inhibited by just 15 minutes of blue light ie blue light can reset the SCN rhythms to improve sleeping. The Reading Teacher. William Henk, Ed.D, Associate Professor of Education and Reading Pennsylvania State University. Colored Overlays Work
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