Casuistical.

Discovering the backpack's empty when you've been wondering if they've been carrying a heavy bundle all night can be really bewildering.
Discovering there are no lenses in someones frames is also kind of a let down, I was mislead to think there was a burden with your eyesight and it seems instead of having poor eyesight you've decided to make it look as if you do. Huh.
It's almost as if you're mocking people with poor eyesight.