I've often wondered about possible getting into that situation sometime in the future. It's a bit scary how your livelihood and even your entire sense of identity relies on good typing skills and reasonable eyesight.

Also, I can sympathize with the author regarding the horrid way some medical practitioners (or perhaps even "the system" in general) have treated him/her. It's incredible when you first realize many doctors will simply not be bothered to get uncommon conditions properly diagnosed! This also has some financial motivation, in that non-trivial diagnostics require a bunch of costly diagnostic procedures (think MRI for example).