: Jumping spiders, while they can't blink, CAN swivel their primary eyes around
: to focus on things.
: Jumping Spider Eye Anatomy
: Why couldn't the Pfhor also have some expressive eye movement while still
: having protruding bug eyes?
Ah, but the page you linked to says that they can't move the lenses, which are fixed in the carapace: they move the back end of the tubular eyes containing the retina. This wouldn't be visible from the outside, and therepfhor wouldn't be expressive at all.
However, I'm sure you could take just a bit of creative license for some swiveling.