"I am going to try very hard to be polite here. It isn't easy because
this question makes my blood boil. I am often harassed by people who
take exception to the combination of my white cane, my glasses and the
printed book that I am reading on the train. But since you asked, I will
try to clear this up for once and for all."
Similar advice applies to other impairments, especially so-called
"invisible disabilities". Via Kee Hinckley.
*** Xanni ***
Chief Scientist, Xanadu
Partner, Glass Wings
Manager, Serious Cybernetics