Dyslexia is a complex language problem. It has to do with the way the brain works, not with vision. It involves not being able to break a word down into the sounds that make it up, and not being able to write and think about the sounds in a word. Kids with dyslexia have brains that work differently to process language. They have problems translating language to thought (in listening or reading) and thought to language (in writing or speaking).