2008/6/26 Alan B. Pearce : >>As I've already demonstrated, I'm no expert on colour-blindness, but >>from what I've read, "full colour blindness" is a progressive illness >>that leads to actual blindness, and it is indeed extremely rare. > > Some people are born fully colour blind. I remember the son of a friend who > had full colour blindness, when colour TV was about to be introduced, asked > 'why, its in full colour already' ... > A mate of mine at university had the same problem. The biggest difficulty he had was traffic lights, at night. RP -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist