Theoretically can, but make sure that the glasses are for those with no short sightedness or long sightedness, meaning just for decoration. Or your contact lens may be further corrected by the glassses, that would be bad for the eye sight.
I am guessing you wear glasses for your eye sight but want the contacts for decoration. The contacts that change your eye color or put a pattern on them don't affect your site so your glasses should still do their job.
Yeah, of course you can. Wouldn't you rather just wear prescription/color contacts instead though? :]
You could, but it'd hurt your eyes. Pretty sure having two lens' would double the effects too, and so make your vision worse...
Why on earth would you want to do this? It probably wouldn't work if both glasses and contacts are prescription but if one of them is just for decoration you'll be okay.
I guess you can.... If your eye sight is not weak then give it a try. If you feel somehow odd then dont try it in future but in my opinion this is possible...