An old saying "If at first you don't succeed - read the manual" I wear glasses both for normal vision and stronger ones for reading, I have the dioptre adjusted to my normal glasses but have to switch to my reading glasses to view the shots on the LCD screen, this makes live view useless to me. I also wear slightly different ones for computer use and have no problems. A friend who has multi-vision glasses found them a hindrance and switched to single vision glasses for photography.
Cheers
Keith.