Here are a few great books that may help you understand the benefits of vision therapy.
Fixing My Gaze by Susan R. Barry (ISBN-13: 978-0465020737) http://www.fixingmygaze.com/
Jillian’s Story by Robin Benoit with Jillian Benoit (ISBN-13:
The Suddenly Successful Student by Hazel Dawkins, Ellis Edelman O.D., and Constantine Forkiotis O.D. (ISBN-13: 978-0943599151)