Up to 10% of children and adults have dyslexia – where you have trouble reading, writing and understanding the written word. It’s got nothing to do with intelligence, but can cause stress, anxiety, depression and underachievement at school and work. International research has been looking for the cause of dyslexia for many years, but a recent study from the Karolinska Institute in Stockholm has come closer than ever to understanding what goes wrong.

Tonic TV | T-S100 | S02E07