In a completely unscientific observation, I have noticed that patients who wear sunglasses into the Emergency Department usually fall into the category of “not right”.
(There is a carve-out here for people over the age of 70 wearing those 2 pound wrap-around plastic sunglasses; they are in a different category). (Oh, and the one person a year with iritis).
Basically, when I have a patient who is wearing sunglasses in the ER, I always give them the benefit of the doubt, and they never dissapoint me with very very odd behavior before their visit is over. And it’s not just me, and informal poll of the docs I work with led to universal agreement.
I don’t get it, but I don’t wear sunglasses indoors, either.