Dyslexia is a learning disability in reading. It makes reading letters, syllables, and words difficult, without any other disorder or intellectual disability being found. It appears in childhood when learning to read. It is diagnosed with tests showing a slowness in reading, great difficulty connecting syllables to form the word, confusion between letters, and articulation problems. The diagnosis of dyslexia is made after finding these disorders associated with a significant delay in learning. It can be improved by speech therapy.