And if you're interested: http://www.deafblind.com/info-db.html

Braille. http://en.wikipedia.org/wiki/Braille

Which idiot is handing out thumbs down to perfectly reasonable answers?

actually, there are ways to communicate with people who are deaf and blind. 1 of the most famous examples was a girl named helen keller. and her famous teacher named anne sullivan, who became known as "THE MIRACLE WORKER".

You imply deaf and blind person - invalids? or persons who are so deaf and blind that cannot accept death of parents. It is really sorry to speak about this and sometimes we have not courage to tell someone about this.