They are closed, to denote a humorous state. It is a common thing in comics, to help convey emotional states without access to high enough resolution in their faces to see it naturally - e.g. an upturned corner of a mouth to indicate a smile could also have done it, except they have no mouths at all to work with here!
What happened to the left one’s eyes in panel 5?
Inflation
They are closed, to denote a humorous state. It is a common thing in comics, to help convey emotional states without access to high enough resolution in their faces to see it naturally - e.g. an upturned corner of a mouth to indicate a smile could also have done it, except they have no mouths at all to work with here!