Is there a name for when characters eyes are hidden from the shot when emotional? The eyes of characters in anime always disappear when they're upset or when they're going to get serious.

Is there a name for when a characters eyes disappear like that?
I have never known this by a specific name, but the closest you may come to is just 'hidden eyes'.

This is usually used to describe someone who is trying to hide their face because they're upset, hurt, not drawing attention to themselves etc. Other terms might be used for characters whose normal hairstyle obscures their eyes, regardless of the situation.