No, it doesn't have to be "just conversation". There's a lot of info about teaching blind and visually impaired students on the web, including technological help available. Just type
teaching blind or
teaching visually impaired into Google.
There's less specifically related to EFL, but try the following links. You don't say how old the student is, or the current level of education, but if s/he's teenage or older, OUP produce a braille version of
Streamline. You can contact them via their website
http://www.oup.com/elt/?cc=it or contact your local rep.
http://www.utpjournals.com/product/c...CL_Donley.htmlhttp://www.afb.org/Section.asp?Secti...ocumentID=1933 http://www.listenandtouch.org/en/Fil...r_July2003.doc http://www.iatefl.org/content/newsletter/163.php