Board Thread:Boruto Discussions/@comment-28341973-20160827204918/@comment-25632268-20161201170340

Elveonora wrote: But Himawari's human eyes just changed into alien eyes, the Byakugan when her toy got destroyed, that's some lame writing.

Exactly. Himawari's byakugan works like sharingan: she awakened it by feeling strong negative emotion, then obviously her eyes returned to normal after some time. If Byakugan was intended work like that, as Thekillman suggests, then Hiashi, Hinata, Hanabi, Neji, Hizashi and some random Hyugas from manga should have normal eyes most of the time. Of course, they don't, so it is rather safe to assume that they were born like this.