Comment Re:A few points for vision-impaired (Score 1) 24
Also check with nearby schools. Under inclusion policies many of them are equipped with Kurtzweil readers, etc., and the teachers/consultants can give good advice and perhaps permit you and grandma to try out different machines and software before you buy anything.
If she doesn't touch-type, I recommend she learn to NOW. Voice dictation software would help her write e-mail to friends, compose memoirs, etc.
IMHO learning Braille at an advanced age is useful mostly for brief prose, e.g., shopping lists and labels. Handheld Braille slates and labelmakers are available.
Many religious and some civic/fraternal groups provide lending libraries of audiotapes and large-print materials.
I also agree with the comments about emotional support. Let her set the pace. Counseling for her and the family might help prevent depression and encourage independence.