I had visual hallucinations (as well as delusions) during a full-blown manic episode a long time ago. More recently, I've had 2 episodes of visual hallucinations, one which included auditory, both in the context of going into manic episodes which were curtailed by increases in medication.

If BirdDancer is right, and schizophrenics do not experience much in the way of visual hallucinations, then who does?