There are different myths regarding the origin ofthe Eye of Ra symbol. However, most experts believe that the symbol was actually the right eye of Horus and became to known as the Eye of Ra/Re in time.The two symbols mostly represented the same concepts.That being said, according to different myths, the Eye of Ra symbol was identified as the personification of many goddesses in Egyptian mythology such as Wadjet, Hathor, Mut, Sekhmet and Bastet.
Ra/Re is the sun god in Egyptian mythology.Therefore, the Eye of Ra symbolizes sun.