The optometrist in town mentioned VT when we pushed him, but he doesn't feel it would be particularly helpful in DS's case. I would try it, except it would likely require at least three hours of travel for us (one way). If it's the kind of thing that needs to be done frequently to be beneficial, it would be quite difficult. The joys of a small, rural town!
You may be able to work with the VT to develop a program where you only go in for sessions once every two or three weeks. We had to travel two hours each way (with two kids spread over 2.5 years!), so I feel your pain.
At the very least, I'd have him evaluated.
