I don't know much about fish meds but I do believe it would be difficult to recommend something when we "think" we're dealing with vision issues. In my opinion as long as mine's appetite for nori stays strong, so will the fish. I have noticed swimming improvement over time so hopefully she's getting better.
I did keep a mirror up to my tank for probably a week to allow the new gem to adjust without getting bullied, and it worked like a charm. Now my gem is the biggest fish in the tank and flares her fins with no problems at her tank mates that were previously bullies.