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"I have heard that coloured overlays can help with visual dyslexia.
How do they compare with spectacles or contact lenses?"
Coloured overlays have been shown in some cases to provide a useful, inexpensive first screening test for visual dyslexia.
They can help to indicate whether colour makes a difference to a person's ability to read text clearly. However, they only
go so far, as they do not help with reading text on a blackboard, or with writing neatly and legibly. More fundamentally,
if there is a difference between the requirements of each eye in terms of colour, the overlay system cannot cater for this.
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