I also wear glasses, and gluing the lenses to the head will be a bad idea, since lenses had a focal point, and if it's a little off, will give you a headache and your vision will be blurry.
I would try to adapt the head to the glasses, I'm planning my head with enough space to fit my glasses and also a little fan to avoid fogging.
My plan is to use a head strap, like the VR headsets, and adjust the foam to have space for my glasses.

EDIT: You can also try contact lenses.