A good article on dyslexia that also explores the visual aspects as well as the phonological ones.
"we are still finding our way with a disorder (dyslexia) that affects between 5 and 10 per cent of our adult population and an estimated 1.2m children."
"The core of John Stein's research has been devoted to showing what causes these differences, and in so doing suggest potential advances in early diagnosis and treatment."