It has no particular meaning. It looks like a guy with no eyes, staring. Can be used when trying to scare people, or when scared, or just to seem creepy and mysterious. It's infectious! O.o

when you've done something so cringe you can't stop replaying it in your head and it stops you from getting on with your every day life

the eyes of illuminati watching you.

A more complex version of the constipated/Cartman >.< or >< or >_<

The face of pure confusion.