An Eyon firing a beam
Eyons are creatures composed entirely of ocular tissue
encountered in Metroid Prime. They plant themselves in
clusters on the walls of the Chozo Ruins on Tallon IV.
When an Eyon detects an intruder, it will fire a sustained green
energy beam from its pupil, which is only capable of vertical
movement, until stunned by a bright flash (any of Samus's beams) or until it is destroyed with
a powerful blast, such as those created by Samus's Charge Beam. When several Eyons become
active at once, the resulting series of beams are an effective
blockade against unequipped enemies. A large group of Eyons will
awaken only after Samus obtains the Charge Beam, though now Samus
will be armed against them.
Apparently, when Eyons die of natural causes they petrify, still
latched to the surfaces where they originally existed.
constructed mechanoids known as Sentreyes
that are highly similar to the Eyons, sharing the same weaknesses
and attacks, though with increased range and flexibility.
Ruins - Eyon
|Immobile organisms entirely composed of ocular tissue.
Capable of launching sustained energy beams when active, the Eyon
is sensitive to light and will close shut if a bright flash ignites
Eyons making a net of energy beams
1.0 1.1 1.2 1.3 "Immobile organisms entirely composed of ocular
tissue. Capable of launching sustained energy beams when active,
the Eyon is sensitive to light and will close shut if a bright
flash ignites nearby." — Logbook "Eyon" (Metroid
- ↑ "This
petrified organic matter looks like a rock carved into the shape of
an eye." —Scan Data (Metroid Prime)