Board Thread:Theories and Speculation/@comment-734582-20150712141917/@comment-26911440-20151208132815

Thekillman wrote: You post doesn't make a whole lot of sense as a reply to mine. You need to see someone close to you die in order to obtain the Mangekyou and someone other person's eye to obtain EMS. Considering that going blind from MS is the result of a weak body, i get that Indra didn't need EMS. But that still leaves the question of how he obtained his eyes to begin with.

Not much is known about how the eyes evolve. So far it is shown to react to strong emotions, which normally tend to be hate and despair. Until Sarada it wasn't said to be capable of unlocking through happiness.

Strong emotions on the Uchiha seemingly affects their chakra, which in turn affects their eyes. He could have skipped the emotion part affecting his chakra because it was already strong enough.

Though I do agree that it is a good question on how he could have gotten it.

There are various ways that it could have happened, ranging from him simply unlocking it through training or hate for his brother for being chosen as his father's successor.