This may not be the kind of hallucinations your wife is having, but when I took 200 mg per day of Amantadine I saw green and pink lace patterns on all white surfaces: ceiling, bathtub, sink, etc. The patterns were quite distinct and very pretty, but also disconcerting.
I cut the Amantadine down to 100 mg per day, and the lace disappeared. I do at times still see a fine, dark grey 'mesh' pattern, but it is faint and goes away when I focus my eyes on it.
My Neurologist does not think the lace was connected to Amantadine, but I know that it was. Your wife might try to cut down on the Amantadine and see if that helps.
Someone else in this forum had an episode of hallucination from Mirapex, so that might be the culprit.