Gazer

Eyeballs were tiny (eight-inch wide), four-stalked, wild beholderkin. They often served as familiars for evil spellcasters. They had 360-degree vision and could see with darkvision out to 60 feet (18 meters).

Abilities
The four eyestalks of eyeballs could cause effects like the spells cause fear, daze, mage hand, and ray of frost.

Uses
An eyeball's eye could be transplanted into a humanoid by a beholder surgeon, the process killed the eyeball in a sense. This was done to turn said creature into an ocular adept, the only divine casters of the Great Mother who weren't beholders themselves. Vestiges of the eyeball's psyche extended some influence on the receiver of this surgery.