Eye sacks were small sacks under Yuuzhan Vong eyes. Colored blue or sometimes purple, they gave the Yuuzhan Vong the appearance of dark circles. They pulsated slightly in response to the Yuuzhan Vong's emotional state. Eye sacks were also considered a mark of beauty among female Yuuzhan Vong; the bluer the sacks, the more attractive.
- The New Jedi Order: Star by Star (First appearance) (As "eyesacks")
- The New Jedi Order: Enemy Lines I: Rebel Dream (Mentioned only)
- The New Jedi Order: Destiny's Way (Mentioned only)
- The New Jedi Order: Force Heretic II: Refugee
- Dark Nest III: The Swarm War (Mentioned only)
- The New Essential Guide to Alien Species (As "eyesacks")
- Jedi vs. Sith: The Essential Guide to the Force