Is there a way to get rid of the glare on the glasses?
I assume you mean in camera, not with retouching, right? With a light source fairly straight on, most glasses are going to reflect. Sometimes (particularly with lenses with non-reflective coating or weaker prescriptions), just a small adjustment like angling them slightly downward will do the trick. Or you need to move your light source off axis (sides or high in the air) so that the reflections aren't visible from your straight-on view.
Also, if you have them face a white wall and move off axis, there will be very limited reflection