For a few years now there has been almost an orthodox view that reading difficulties, such as Dyslexia are a consequence of what is referred to as a Phonological processing difficulty.
That there is a visual component has been sort of accepted but ignored by many researchers.
Work by Sylviane Valdois and others has strongly reignited the discussion finally demonstrating that it is possible to test out the role of visual processing independent of phonological contribution.
2014 promises to be a fascinating year in the dyslexia story. Watch this space!