It's under influence of Senjutsu like Sasuke's eyes
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Author is implying that Boruto has Senjutsu chakra dormant within him, I think it also confirms his eye is more powerful than Byakugan because it relies on more power.
So basically, anime confirmed Boruto inherited Senjutsu from either Naruto or Momo, in either case he will most likely have six path senjutsu.
