The magazine Optometry Today has once again highlighted the debate about whether there is a link between vision and dyslexia. Geraint Griffiths has replied to the latest statement from Orthoptists in the letters page in the issue July 11th 2015.
He explains that Orthoptists do not refract or measure fixation disparity (sensory fusion) or understand the physiology of normal binocular vision, which is intimately related to the accommodation vergence reflex. The tests used in their research were designed to elicit gross pathology, in this case manifest squint, and therefore lack the sensitivity to show a visual relationship to dyslexia.
For a variety of reasons including the NHS voucher restriction, a normal NHS eye examination cannot investigate reading performance in children. Schoolvision uses eye dominance, accurate refraction at a reading distance to allow for accommodation facility, fixation disparity at near and investigation into visual stress to improve reading speed and fluency.
Follow this link to find out more about Schoolvision www.schoolvision.org.uk