Use a nice eye rinse or red-eye remover.

I'm sure most people have that problem as well and when I use my red-remover (I had some stuff that works like a charm that will make them white and makes them look more "open."

That and when I would walk by my parents, I might talk to them or mutter "hey" but not look directly in the face.

Or I might walk in on my cell phone having a convo and my parents don't stop me to talk or whatever.