It has been a widely held belief among eye specialists that the condition sometimes known as “word blindness” is linked to visual deficiencies. In the first study of its kind, new research has revealed that there is no evidence for such a link.

Teams from the Universities of Bristol and Newcastle carried out eye tests on a group of 5,800 children, and discovered that there were no differences in the vision of those with dyslexia. The study found that those with dyslexia were no more or less likely to have short or long sight, squints or focussing issues. Lead author Dr Cathy Williams states "Some practitioners feel that vision impairments may be associated with dyslexia and should be treated. However, our study results show that the majority of dyslexic children have entirely normal vision on the tests we used."

The discovery could have a major impact on certain costly corrective treatments, typically involving coloured lenses and overlays, which may be prescribed privately for the condition. Dr Creavin of the University of Bristol asserts that the study highlights the need for clearer, evidence based guidance for parents of children with the condition.

Sources:

1. BBC:
   Dyslexia not linked to eyesight, says study.
2. ITV:
   New research questions supposed link between bad eyesight and dyslexia.