A few months ago I was listening to NPR in the car and they were interviewing a woman who was visually impaired and had a PhD in physics. It was remarkable to hear the struggles she went through to learn math and physics, which you can imagine involves a lot of visual aids.
As God would have it, I now have a visually impaired student in one of my Algebra classes. I've been searching for resources, but there is very little available for sighted people. I found a great web site in Texas by a woman named Susan A. Osterhaus. I've spent quite a bit of time searching her site just trying to get a handle on what sort of training I would need in order to work with a visually impaired student. It seems there are two different forms of tactile learning for the blind, English Braille, which is used for reading and writing words, and The Nemeth Code, which is used for math type learning. I haven't yet been able to locate any proper training in New York, but I will continue to search.