Is there a way to see spots on a model that don't have any weight painting on them? I'm trying to get my model's head to pose correctly but when I try to pose it, some of the face (eyes) stays in one spot.

Here's the blender file:




Head up


Head to side


Head normal
What happened was, the "neck" vertex group had some weight painting from the "head" vertex group. All I had to do was select the "neck" vertex group and subtract from it.