What is Magnus's Eye?

Magnus wore an eye patch over one eye and the missing eye is a symbol of the fact that he felt a deep sense of loss. The feeling was not because it was a handicap. He never mentioned being able to see less clearly or to have problems doing any particular task. Instead, he felt that people looked at him differently because of the eye patch. He said he felt a sense of loss. Aritomo gave him a tattoo of an eye on his upper chest as a means of helping Magnus deal with the feelings.