Robert, you're gonna love this one:

I have an aniseimetrope whose vertical imbalance is over 9D/cm.

I've read that a slab off can effectively address 5D. The lab is assuring me that a slab-off can handle 11D.

Px has historically been reading with just one eye, but likes the idea of binocular vision if possible.

Am I just spinning my wheels with a slab-off? Even with monocular images on the same axis, will the size difference kill fusion anyway? What's the typical tolerance there?

Mathematical explanations most welcome!