The Eye of Rimsala is an enemy fought during the final boss battle in Carltron's Lair
Waves of Eyes spawn and fight identically to the other Rimsala-type enemies in the game - they rapidly spin around the arena, dealing damage on contact. They have high physical defense, which in tandem with their high speed makes it difficult, but not impossible, to pin them down with physical blows. A better option is alchemy, which they are more vulnerable to than most other enemies in the final battle, and alchemy is more reliable for landing hits.
The player gets 1,050 experience per Eye; not much at this point in the game, but it may be enough to help level up before the final boss.