A Guide to Making Documents Accessible to People Who Are Blind or Visually Impaired
http://acb.org/accessible-formats.html

Sutton, Jennifer
American Council of the Blind
2002

Abstract:

This document contains a comprehensive discussion about how to make print and electronic information available to people with visual impairments in a variety of accessible formats. Consumers who have limited vision or are totally blind have unique access needs. These needs depend on the amount of vision each person has for reading. Some people have usable vision, allowing them to read large print. Others choose to read braille on paper, while a third group prefers to use a computer with synthetic speech, or refreshable braille display, to read electronic documents.