Board Thread:Boruto Discussions/@comment-29261733-20170713102406/@comment-1872728-20170714131747

I know Chinese so I'll translate the passage.

"By the way, there have been a lot of audiences debating on what eye this is. I'm a staff member so I can't randomly give out spoilers, and I don't have time to look through all the scripts, but after 15 episodes of revealing it doesn't matter anymore, right now this is not the Tenseigan nor the Byakugan (even though I really want Boruto to awaken the Byakugan......) anyway the official name is Pure Eye. Here is an example of the abilities as of now."

The characters 浄眼 can also mean cleaning eyes, which could explain why the drawing shows Boruto cleaning his eyes with eye drops, and possibly hinting that his eye won't be activated for the time being.