My 15 year old daughter has been experiencing constant 24/7 vision disturbances for the past 4 years. She says she feels like her environment is a "box" and that the box is constantly slowly rotating or tilting. The sensation is worse when in large open spaces (football field, gymnasium) but is always present even in small spaces. She has had headaches, so we have been thinking migraine, but I have never heard of a migraine causing rotating/tilting vision all day, every day for 4 years. We have seen an opthamologist, ENT, and are scheduled to see a neurologist. Any ideas on what this could be?