The Eye of Ra or Eye of Re is a being in ancient Egyptian mythology that functions as a feminine counterpart to the sun god Ra and a violent force that subdues his enemies. The eye is an extension of Ra's power, equated with the disk of the sun, but it often behaves as an independent goddess. This goddess can be equated with several particular deities, including Hathor, Sekhmet, Bastet, Raet-Tawy, and Mut. The eye goddess acts as mother, sibling, consort, and daughter of the sun god. She is his partner in the creative cycle in which he begets the renewed form of himself that is born at dawn. The eye's violent aspect defends Ra against the agents of disorder that threaten his rule. This dangerous aspect of the eye goddess is often represented by a lioness or by the uraeus, or cobra, a symbol of protection and royal authority. The Eye of Ra is similar to the Eye of Horus, which belongs to a different god, Horus, but represents many of the same concepts. The disastrous effects when the eye goddess rampages out of control and the efforts of the gods to return her to a benign state are a prominent motif in Egyptian mythology.

The Eye of Ra was involved in many areas of ancient Egyptian religion, including in the cults of the many goddesses who are equated with it. Its life-giving power was celebrated in temple rituals, and its dangerous aspect was invoked in the protection of the pharaoh, of sacred places, and of ordinary people and their homes.