Hi everyone. I need a little advice. I received an Rx from an MD.
He is prescribing prism for the bifocal only AND a slab off. He wants a progressive bifocal. Doesn't the slab off eliminate the need for the prism? And, is it possible to have the prism just in the seg? After talking to this MD, I am doubting myself!! Please help! The prism he is prescribing is .50 base out O.U. I know (or thought I knew ) that the slab off is base down. There is a 6 diopter difference between the lenses for reading. The Dr. did not prescribe slab-off or prism initially. The patient returned to the Dr. after I explained slab-off, and the MD gave her a new script that said "slab-off if desired". That's when I called him to verify his request. Any help woud be appreciated.

Thanks,
Mary