Board Thread:Boruto Discussions/@comment-25319479-20160502145551/@comment-24824859-20160504235413

@Lycropath The reason why it's spreading is the result of him preparing to use Sage Transformation. This is no different than Curse Mark users. Kawaki isn't using Sage Transformation and has already had the marking on his eye That still wouldn't mean Boruto would have a vein-less, one-eyed Byakugan. The only example that you brought up that is similar to this scene is Sasuke's one-eyed, tomoed Rinnegan. But that is due to Hagoromo's intervention.