Indeed there is a small screwdriver on the Micra. I pulled a Micra and an SAK out of my pockets and compared the Micra blade to the SAK corkscrew eyeglasses screwdriver, then tried both on a couple of pairs of eyeglasses.

The Micra blade is a little large but it works fine if the screw is a little proud of the hinge. It is too wide to follow some screws down if the screw winds up being recessed very far - depends on the specific glasses and screw. The SAK screwdriver is pretty conventional at the business end and managed everything just as expected.

The Micra screwdriver is good enough, I'd say, although less than ideal.

I scanned a pic of the two blades for the terminally curious, but it will have to wait until I can upload the pic tonight.

Corona is not the only cap needing a lift, but it's a good one <grin> - but I use my SAK for that.

Tom