Dyslexia is a learning disorder that is characterized by a difficulty in reading due to problems identifying speech sounds and understanding how these speech sounds relate to letters and words. It is a reading disability and affects areas of the brain that is responsible for language processing.
Dyslexia is typically diagnosed in childhood however it often continues into adulthood. Most of the children with dyslexia are not diagnosed till they reach adulthood, however some adults diagnosed with dyslexia have found a change in symptoms as they grow older.
About 50-60 % of people with ADHD also have some type of learning disability such as dyslexia. ADHD is usually identified the very first day in school. Dyslexia on the other hand remains undiagnosed for a longer period of time. It is recognized when a child reaches fourth or fifth grade and there is a shift from learning to reading.