Board Thread:Boruto Discussions/@comment-31377229-20180125162054/@comment-6769189-20180125202045

Lack of disorientation associated with FTG can be attributed to practice. There is a reason that only 2 ppl in the entire series can even use it, never the less effectively.

The Raikage might not have to deal with tunnel vision because of the optic nerve beinh stimulated.

Even if the Byakugan has 360 vision, it will only be possible to clearly see in the direction of travel. At best everything else will be a blurry mess.

It is possible that the Chidori/Raikiri's speed is additive. So regardless of how well the character can see at their natural top speed, using either one of them adds the speed of lightning on top of that. Given how it got its name this would most likely be the case.