Why does Bernie Mack's eyes look cocked on some episodes of the show? Does He have a twin or what?

he has what is commonly known as a ';lazy eye.'; So, every now and then it will get stuck in a certain position and won't move in unison with the other eye and that is why it looks ';cocked';.Why does Bernie Mack's eyes look cocked on some episodes of the show? Does He have a twin or what?
He has a cocked eye. No he doesn't have a twin.Why does Bernie Mack's eyes look cocked on some episodes of the show? Does He have a twin or what?
Maybe he has problems with his eyes that can't be


helped or treated.