Dyslexia is a disorder characterized by readability a number of distortions and difficulties in reading, which are related to language processing mode. The most common symptoms are substitutions, omissions or mixture of whole words or parts of words while reading, and the slowness and difficulty in recognizing and understanding words and texts. In contrast, children with dyslexia can correctly understand stories or oral speeches with the same content, and in most cases their level of intelligence is well within the normal range for their age. Symptoms of this disorder usually occur when children are in the first years of primary education and early detection is very important for early diagnosis and treatment. Moreover, in many cases dyslexia occurs associated disorder attention deficit hyperactivity disorder or conduct disorder, among others.