I just got back from the eye doctor, who gave me a new prescription and an unexpected bit of cash saving advice. I think this would help anyone who needs a different prescription in each eye. In my particular case it's +2.5 diopter in the left eye, and +1.5 right. I also need a bit of prism correction.
The doc told me I could go get glasses made, but it would cost quite a bit. The cheaper option is go somewhere that has a big bin of cheap reading glasses - WalMart, Costco, etc. Find two pairs of glasses with the same frames, one pair that has correction for the left eye (+2.5 diopter in my case) and one with the prescription for the right eye (+1.5 for me). Then swap the appropriate lenses. Total cost: $10 or less.
I don't think this would work if you a lot of astigmatism, or a negative diopter prescription. It also doesn't include the prism correction, but in a lot of cases your eyes can compensate over time (eyeball badassity!) But I think you could give it a try by just putting on the glasses and closing one eye at a time.