We've published numerous articles about how to dress at work--and although sunglasses haven't specifically been mentioned, I'm pretty sure they are usually deemed inappropriate ... even at a company like Yahoo! HotJobs, which has a fairly casual standard of dress (I wear jeans to work unless I know I have a meeting with someone from another company--or unless I have something dressy to do after work).
But what if, like me, you have a broken blood vessel in your eye (harmless--just something that happens occasionally due to overexertion--but nonetheless disgusting to look at in a "28 Days Later" sort of way)? Should I cover up with sunglasses, or should I risk turning stomachs with my bright-red eye?
This reminds me of one of my favorite quotations from one of my favorite etiquette books, Eleanor Roosevelt's "Commonsense Etiquette" (emphasis mine): "If ever following a rule of etiquette would be unkind, forget the rule and just be kind instead. That's good manners."
So I'm leaving the sunglasses on. It seems the kinder thing to do.