Here’s a gag idea: You call attention to your glasses and mention that everyone has cameras in their glasses now. You then pull/shake a camera out of the glasses.
That’s it, a quick sight gag.
To do it, the easiest way would be to palm a small camera and produce it. More complex methods would be a camera that collapses. A simple, but pain to make would be a latex or sponge camera.
There you go, if this idea interests you, go out and do it!
-Louie