I have this same problem, and here is what I have found concerning the P4 Woman. The joint parameters on the Z-axis are set to 0.030. The problem is that the actual center of the eyes on that axis is at 0.0296 so when you roll the eyes down they are off center and pop out of the sockets. I made a GIF to illustrate. Sadly while Poser will let you enter in the correct number for the Z-axis it then rounds it off back to 0.030 The best way to fix this would be to morph the eye balls back to the center of the axis, and scale them up just a little to fit the socket. I have tried to do that, but the eyes don't seem to want to import into Rhino then back to Poser. Maybe someone else with more experience could do this.