That is,「狐の目」; Eyes that "look like little slits but they're always like that and the person can still see fine."
It seems that it's just getting put as eyes_closed currently, but are we cool with that? It's not super important, but it came to mind so I thought I'd bring it up.
A quick search turns up a thread in which this was mentioned from almost a year ago, but apparently nothing ever came of it.
Updated