You create an invisible eye that hovers in the air. You mentally receive visual information from the eye. It has darkvision out to 30 feet and can look in every direction.
As an action, you can move the eye up to 30 feet in any direction. There's no limit on how far away from you it can be, but it can't enter another plane. A solid barrier blocks the eye's movement, though it can pass through an opening at least 1 inch in diameter.