@theluthier Maybe the pivot point for the eyelid rotation should be further away from Piero’s beak because the eyelid isn’t a perfect hemisphere. With the pivot point in the center of the eyeball I get this result when fully opening the upper eyelid while the “Subsurf Modifier” is active:

I also can’t move the eyeball because this would create an unnaturally big gap between eyelid and eyeball when the eyelid is fully opened.