One of the most common learning disabilities of our time is dyslexia. Although it has been known for quite a long time, it still represents a critical and problematic issue in teaching. In my thesis, I would like to describe the phenomenon of dyslexia; I intend to explain what it is, how and why it develops. I will also present the different symptoms that go with it and what kind of efforts have been made in the field, in order to cure, treat or prevent the disorder.