T.V. Raman, blind engineer currently with Google, was asked to write an article describing what it is like to be a mathematician who cannot see. the article, thinking of Mathematics, and a commentary written to address subsequent questions, can be found online. The author hopes that it encourages blind math students and serves as a resource for their teachers.
"The world is too full of factors to discourage students who cannot see from pursuing a career in science
Click this link to read thinking of Mathematics from http://emacspeak.sourceforge.net/raman/publications/thinking-of-math/.