Have you tried contacts or considered laser eye surgery? I had lasik and it was one of the best things I've ever done. I went from 20/400 vision to 20/15
I believe the crew at oculus said that they looking into having it so you can get prescription lenses for it when it's actually released.
I might get some contacts specifically for this level of viewing. I am thinking of actually taking in the commercial version to the eye doctor next year