The symbol of the Eye of Horus—that is, wedjat—was used for protection, healing, as well as mathematical and medicinal calculations in ancient Egypt. In fact, the Eye of Horus, or all-seeing eye, is one of the most recognized symbols of ancient Egypt. It was in use throughout the thousands of years of Egyptian civilization and continues to be used today.

According to Egyptian mythology, Horus/Heru loses his left eye in one of his struggles with Set for the right to rule Egypt and to avenge the death [Page 251][Page 252]of his father Ausar. The eye was restored by Hathor, and this restoration came to symbolize the process of making whole and healing. Some versions of the story indicate that Djehuty restored the eye. The restored eye ...