Hi bk1! My link I posted above doesn't go where I wanted it to go!!! Sorry! Here is one I hope works
http://www.covd.org/ .A FCOVD is a Fellow of College of Optometrists in Vision Development(FCOVD). They do very specialized testing and therapy for different visual problems. You should check out this site to see if it sounds like it is something that could help your child. They have a doctor finder and you type in your zip code and it finds ones in your area. In a 100 mile area around me there are only about 10 so there aren't lots of them out there. Luckily there is one about 30 minutes from where I live so I am able to take my child for therapy once a week and he does therapy on the computer for 20 minutes every other day. It has been wonderful and I am seeing results with him already!
Hope this helps! :-)