Board Thread:Theories and Speculation/@comment-890307-20161205161301/@comment-25122992-20161218144551

Nope, that's not how it works. The original MS eyes are actually removed and replaced by the MS eyes of another person, which means that the removed eyes can be preserved somewhere. And the combined pattern of the EMS is the result of the interaction between the user's chakra and the newly-transplanted MS eyes.