Well yes, but not turning up for work because your mate has had one? Seems a bit weak to me.
The english language does not do it itself favours with terms like 'anxiety attack'. People who do not not know what it is really about should not pretend that they know what it is about and make jokes about Liverpool fc.
If your mate lost his vision and was incapacitated, it would not be unreasonable for a mate to help out. Perhaps you should start by asking how badly someone can be affected rather than starting off with your personal definition of anxiety, and then extrapolationg from there
Perhaps we should shoot people who claim them have an anxiety disorder. That strategy worked out really well in the first world war, did it not?