So I made some eye types and using Spiral Spy, was able to test them and take some pictures. So here goes-
Corrupted eyes: http://i.imgur.com/lh8b8e9.png
Based on the swarm turrets, these eyes will give the knight a corrupted, evil appearance.
http://wiki.spiralknights.com/File:Monster-Swarm_Source.png
Disconnected eyes: http://i.imgur.com/k7SWH6n.png
Its every support classes' fear... you're going along, your friend with the gun and sword is kicking butt and you're dropping stagger storm. And then.... OH THE HORROR.
Googly eyes: http://i.imgur.com/cHpcQBx.png -OR- http://i.imgur.com/XaCzHQs.png
It was once written how every game needs googly eyes, and I feel like this could be the perfect opportunity to show off just how ridiculous you really are.
Retro eyes: http://i.imgur.com/zm21lLM.png -OR- http://i.imgur.com/LyZ7W8z.png
I've always been a fan of older games, and I know for a fact that Spiral Knights was influenced by a huge number of these sorts of games.
Serious eyes: http://i.imgur.com/u8SKNsp.png
For those of us that just can't take a joke, and want to stare down every single monster in our path.
Crying Eyes: OLD: http://i.imgur.com/l3i5ty6.png NEW: http://i.imgur.com/wVbdGTr.png
For those sad moments.... when you want to resemble the weeping angels from Dr. Who! :D
Bored Eyes: http://i.imgur.com/ld5MTBX.png
The perfect item to use while waiting for the gunner update.
Eyecons
But wouldn't the art team have to make.. the icons? Like at the shop? Oh no! But wait, I made that too! Hooray!
http://imgur.com/oFftVeS,Uvolc1L,XKMNjU6,Uz84naQ,2lYcA19
Download
EDIT: I have actually updated this. It should contain all 7 of the eye types, as well as a couple of variations. There are also eyecons for the editional eyes as well, even though I didn't put them under the eyecon tab above.
The Retro Eyes are the best ones, with Disconnected Eyes close behind. The latter gives the knight a more robotic look, though.