MP3 for sight impaired senior

I can't suggest an mp3 for someone with a visual problem and I don't know how a touch unit could help. What I do want to say is that you can download books from most libraries with either the IPod Touch or Zune Touch to LISTEN to, not watch. Yes, others with good vision, can also dl them to read. My library in Marin County, CA allows me to dl 8 books at a time so I always have plenty to read and the most important thing is that it's my very old mp3 player. They have recently added the ipod downloads thru Overdrive.