Piggy's Eyes Bulge Out When Nervous?

[Rochester Piggy]

I have noticed lately that when I pick Cali up, her eyes bulge out a bit and I can see the white all around her eyes. When I set her back down or when I've been holding her for a few minutes, her eyes sink back in to normal. Is this normal?

 

[Flutterby]

In general many animals show the whites of their eyes when nervous or fearful, I wouldn't worry to much about it, just train to help her regain her confidence when being handled.