Wadjet is the cobra goddess of Buto in the Delta, the uraeus on the king's brow, the fiery Eye of Ra who spits at his enemies, and with the vulture Nekhbet one of the Two Ladies who hold the Two Lands. She is 'the green one' of the papyrus marsh, the nurse of the infant Horus at Chemmis, and the protector of the king and of women in childbirth. Her temple at Buto was famous, Greek writers called her Leto, and she is not the wedjat-eye amulet, which is Horus's eye.
Modern Practice
Wadjet is called for protection of a person or a house at its threshold, and for royal or sovereign work. The practice is the image worn or set above the door, and the offering is milk and green papyrus.