Board Thread:Naruto Discussions/@comment-3232093-20140617193601/@comment-25708482-20141119000209

I think we are using the term for his doujutsu too loosely. We say Sharingan, but is that accurate? Just like how Kaguya's Rinnegan was unique would the evidence not suggest the same for Hagoromo's "sharingan". We have seen Indra had a unique appearance unlike any other EMS, MS, or Sharingan to date. In reality it looks like a degenerate form of the Rinnegan more than the sharingan. Even if it is not the case I think we can all agree Hagoromo probably held a Doujutsu unique to himself and for lack of a better word we simply are calling it a sharingan. The reality is he probably had something else entirely that developed into the Rinnegan.