Dyslexia is a condition that causes someone to have trouble reading, right? O.K., so what are Visual, Auditory, Phonological and Orthographic Dyslexia? What are these all about? Answer: The meaning of the term 'dyslexia' can depend on who is using it. The terms for different types of dyslexia describe certain very specific symptoms and conditions that pertain to the problem in general. The details are explained, just read on.