My pre-trip checklist now includes “Duct Tape”, so, when the tiny screw holding my sunglasses together went spung and dropped the lens on the parking lot gravel, I was prepared:
I continued the mission in full-frontal Harry Potter mode.
Fortunately, it’s a captive screw and returned home with us. Back in the Basement Laboratory, with a Philips 00 screwdriver and threadlocker at hand, the repair was no big deal:
You’re looking at the screw head, believe it or not.
And, no, I’m not packing a Philips 00 screwdriver on our next trip.