Blind people access computers, Web sites, and mobile applications through screen access software that converts what is on the screen into spoken words or Braille, but improperly coded Web sites and applications can prevent this software from working properly, denying the blind user equal access.

Read more at
http://www.accessibilitynewsinternational.com/national-federation-of-the-blind-and-hr-block-announce-agreement-assuring-accessibility/