The good news is that modern technology helps readers with a vision disability:
Luckily, we live in an era of technology where the world of literature should be easily accessible. People are able to read electronic text with the assistance of text-to-speech technology. This is a pretty basic aspect of life with a print disability in the 21st century. There are many varied programs available from those on your desktop or laptop, to your mp3 player and phone. These programs fit a range of needs and the world of reading is at everyone’s fingertips. Thank goodness we live in the future.
As you've guessed from the title, though, restrictive anti-consumer media locks hurt these readers the most.
The vast majority of ebooks available for purchase, however, have DRM enabled. Amazon is the biggest culprit and disappointment in my life. There are so many books now available in electronic format taunting me from the Amazon store.
Do read on here: http://visibilityfiction.com/drm-discrimination/