Looks like you were just fooled.There is NO such thing as Boruto's dojutsu in the manga!! I don't give a s**t to what the anime shows.
Boruto appeared in the first pages of the manga having ONE byakugan in his scared right eye in a kakashi-like style.
So, I don't think it is his original eye
Most people believed that his eye wasn't his because it had a scar, but the writers fool'd ya. You should be happy that the situation isn't a complete rehash anyway.
I bet Boruto loses his eye and he starts to rely on his Dojutsu, when-ever that happens.
Gonna be epic though Zzz