"Dyslexia is a specific leaning disability that is neurobiological in origin and typically manifests through difficulty in reading, writing, spelling and math. It has nothing to do with intelligence, birth defects, or a mental illness of any kind, the home environment, level of education or economic status.
Dyslexia persists throughout one's lifetime and is prevalent in every culture in the world. In the U.S. it affects as much as 10% of the population.
Surprisingly, however, Journey into Dyslexia reveals that many adult professionals who once struggled to learn in school consider their dyslexia a unique gift and the defining reason behind their success."