I have treated one patient with this condition (briefly in an acute care hospital). He was in his 30s, male, fit & well. Finally diagnosed with opsoclonus after neuroloist review. I found his eye movements bizzare to watch and his balance was impaired as a result of this and some of the myoclonus.
We did a bit of static and dynamic balance work and I tried some gaze stabilisation exercises (VOR gain and suppression) to see if that would help. He was able to mobilise independently with one crutch after a few days and his gait did improve a bit with the exercises. He was discharged from acute care after 4-5 days and I don't know what happened to him after that (I did refer him for a PT followup but never found out what happened to him). I will investigate further and see if I can find out what happened to him when he went home. He was told it should hopefully resolve in about 12 weeks.