Bogleech Halloween Classics:
I first encountered these adorable little eyeball monsters as a dog toy, all three of them linked by a thick rope. They have a nice little "video game enemy" feel to them, and the third one is especially interesting; the first two each have a small mouth under their eyes, but the purple one has a pair of beady, tiny blue "normal" eyes above a huge one that would resemble a mouth when shut.
In 2008, I was able to hunt down a set of rope-free, slightly larger ghostly eyes, a pristine set of ocular phantasms! Here you can see their cute, nubby little tails, which is why I'm inclined to call the "ghosts."