Board Thread:Boruto Discussions/@comment-5085906-20170430152255/@comment-734582-20170505174612

AsianReaper wrote: It was said in the very beginning that the Sharingan was something awakened by only some Uchiha. Sasuke said it himself. Then again, that was like before the first big Zabuza fight so idk if Kishi was just like nah everyone gets one. Well, it can mean that it was one of those things simply retconned (he does mistake Kakashi for his brother when he shows the Sharingan) or it could mean that there is a certain type of Uchiha that gets it. I mean it seems doubtful that the stay-at-home-moms meet the Sharingan conditions easily. Same goes for any Uchiha who didn't directly become a Ninja. Still, the manga itself shows that many Uchiha had it so it wasn't quite that rare. It's possible Sasuke had a biased view as well, since the Sharingan is easily hidden and many kids his age would not have the Sharingan, which would make it hard for him to accurately know how many awaken it.