If Eye of Ra is the right eye, and Eye of Horus is left, then probably left eye symbolism that [they] have all shown is a way to confirm that they are "children of [their] god."

John 8:44

You are of your father the devil, and your will is to do your father's desires. He was a murderer from the beginning, and has nothing to do with the truth, because there is no truth in him. When he lies, he speaks out of his own character, for he is a liar and the father of lies.