eyeball
Eyes are organs that detect light, and give visual stimulation.
Tag can be used when eyeballs have a strong or obvious presence in the picture, such as floating, being held, scattered around, on characters' attire, in foreheads, etc.
Examples:
- Backbeard the giant floating eyeball from Gegege no Kitarou
- Nightmare (Soulcalibur) with his Soul Edge sword, which has a large eye near it's hilt.