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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. One side of the overlay has a matt coating. Some matt coatings can reduce transparency, but coloured overlays from Crossbow Education have been subjected to stringent testing to ensure that maximum print clarity is retained while reflected light from the overlay surface has been significantly reduced. Nevertheless, some people prefer using the gloss side of the overlay. Irlen: Irlen lenses, also known as Irlen Spectral Filters, are coloured overlays or lenses that aim to reduce perceptual distortions and visual stress experienced by some people with dyslexia. The specific colours are customised for each individual based on their symptoms. Blue filters can be even more effective. Joe Taylor showed that they probably work in a different way; because blue can affect the brain unconsciously. From the grainy two-dimensional images that are projected onto our retinae, and projected to the visual cortex via the retino-geniculate pathway, the brain creates a conscious vivid and detailed three-dimensional visual experience. But blue projects to other important pathways running from the eyes deep into a primitive part of the brain called the hypothalamus; this controls powerful physiological systems that regulate our diurnal rhythms: when we wake up, the daily rise and fall of our blood pressure, energy and hormone levels, that we are hardly aware of. Melanopsin retinal ganglion cells and their projections (melanopsin RGCs)
Bright blue light can also improve auditory attention, suggesting that the effects of light on alertness and attention are automatic and not mediated by conscious visual perception. Rather they are mediated by this retino-hypothalamic synchronising system. Dyslexia is a neurological condition affecting between 7-10% of the population. It is a learning disability which has an impact on a person’s ability to learn how to read and write (despite adequate intelligence and educational opportunities).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 main aim of DRT research into visual and auditory weaknesses in poor readers is to develop treatments that will help them, and to prove by properly controlled trials that they work. We have shown that simple treatments such as viewing text through blue or yellow coloured filters, musical training or eating oily fish, really can help children to learn to read. Please note the colours shown in the pictures may not be an exact representation of the colour in real life. 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?
What is dyslexia?
Overlays are similar to the aforementioned tinted glasses. They come in a variety of colours to suit the personal preferences of each individual. For example, in a rigorous double-masked design (in which neither the subject nor the experimenter knew the true diagnosis and prescribed colour) researchers from the University of Edinburgh reported that Irlen coloured overlays had no immediate effect on reading ability.
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.That being said, here are a few popular brands and technologies that are commonly associated with dyslexia glasses and lenses: The vision screening that most children undergo at school entry (age 4 to 5) is only a test of whether a child can see clearly in the distance. It is not a comprehensive assessment of eyes or vision and does not test any of the functions required for clear and comfortable vision when reading. For this reason, every child should have a full sight test when they start school, and as frequently as recommended by their optometrist after that. But disagreement among researchers still exists over the mechanisms and theory behind the filters’ effects. And debate still rages surrounding the fundamental issue of which colour is needed to achieve optimal results. Myth versus evidence
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