After having a couple of people coming onto the branch with broken glasses this week, a word of advice. Do NOT attempt to fix your glasses using superglue (or any other glue for that matter).
Superglue can wreck the coating on your lens and is also very hard to remove once on. In addition, the fumes can be an irritant to the eyes.
When used on the frame it can prevent the arms from folding and also clogs up screw holes (meaning that old screws cant be removed or new screws put back in). The residue left usually means that replacement lenses can't be put back either. If you have a loose screw in your specs get an optician to put a new screw in - don't glue one in!
The best bet in the event of a broken frame to take the specs to your opticians first. Usually metal frames can be repaired and / or the lenses put into a new frame. They can at least advise what to do next.
And you won't glue your fingers together either!