Kamui's Dimension

Kamui's Dimension[1] (神威の時空間, Kamui no Jikūkan; Literally meaning "Kamui's time–space dimension") is an alternate space that is linked to the eyes of any users of the Kamui jutsu. Each set of eyes comes with it's own unique dimension and they vary wildly between users.

Appearance
The appearance of the Kamui Dimensions vary radically between individual users of the jutsu. It is not known exactly how a person becomes linked to a particular dimension but the appearance of the dimension traditionally reflects the character of the user.