Please run far away from anyone suggesting vision therapy to treat dyslexia!!
The American Academy of Pediatrics, International Dyslexia Association and many other professional groups have been warning about vision therapy for years. (
http://www.aao.org/about/policy/upload/Learning-Disabilities-Dyslexia-Vision-2009.pdf)
Dyslexia is a phonological problem that needs to be addressed with high quality multisensory language instruction- it is not a visual problem. Orton-Gillingham is widely considered the gold standard for remediating dyslexia. Many brand name programs, including Wilson Reading, are based on the Orton-Gillingham approach.
I second the previous comment- "Overcoming Dyslexia" and "Proust and the Squid" are great books for you to learn more about what exactly dyslexia is and is not. I also highly recommend "Parenting a Struggling Reader" by Susan Hall and Louisa Moats. It is an excellent resource for parents trying to navigate the maze of getting help for their child.
I speak from experience as a certified reading specialist trained in Orton-Gillingham, and Wilson Reading.. I have taught many students with dyslexia. Some had previously tried vision therapy and it always resulted in wasted money and frustration for the student and parent.
If you'd like to speak further, I'd be happy to provide my contact information.