I wear multifocals and just take my glasses off and put the goggles on and it all works, I have a set of diopter adjusters for my Dominators but have never needed to use them. It would be best if you can find someone that has a pair so you can try them.
I am a +3.5 for close up not so bad for longer distances. If you can sit about 7 feet from a 40 inch TV and see it okay then you should be okay, if not then it might or not.
Pete