Lots of good suggestions re using technology to help in the classroom.

Just wanted to add that most new computers also have speech functions, where you can highlight a block of text and the computer will read them to you. On a Mac, it's under System Preferences > Speech. On newer PCs I believe Vista has a similar feature somewhere in the Control Panel.

Do the doctors have an explanation for the double vision? I don't know much about these things, but it seems that the causes can vary. For example, my father experienced double vision a few years ago and they diagnosed him with Graves' disease -- essentially an overactive thyroid. It took some tweaking of meds, but they eventually got it under control.

Good luck!