The wadjet eye is perhaps the best known of Egyptian amulets and relates to the story of the fight between Horus and Seth. In this Seth took out Horus’s eye but the eye is made whole again and is thus a symbol of healing.
Usually the wadjet eye is considered the left, lunar Eye and the right Eye is considered the Eye of Re. However, the ancient Egyptians did not always distinguish between the two (Darnell 1997, 35).
Darnell, J.C. 1997, ‘The Apotropaic Goddess in the Eye’, Studien zur Altägyptischen Kultur, 24, 35-48.