Broken glasses

Note to self, don’t leave your glasses on the side of the armchair, my hubby sat on them. The little screw that holds the frame together has disappeared. I can’t see it anywhere. I looked at taking the screw out of an old pair, but my small screwdriver is too big. So I’ve sellotaped the lens in place but that’s unwrapping as it gets warm. Why do things have to go wrong!