Kanshume

Kanshume (看取眼, "Perceiving/Seeing Through Eye") is a specialized Kidō spell, invented as a derivative of the Kaidō field of spells.

Overview
Nicknamed the "eye that sees through everything and anything", it is a spell created through the teachings of Kaidō, which deals in spells that influence a target's body; its most common application being healing techniques, but its true purpose is to manipulate a person's anatomy and the chemicals within their body. Kanshume is a spell which changes the user's eyes. Normal eyes possess a single pupil, which serves the purpose of regulating how much light enters the eyes so as to allow a proper degree of sight. By using a special form of Kidō, it is possible to alter the chemistry of one's eyes to enhance perception and grant the eyes even greater abilities. In doing so, the eyes take on a more red color and the pupils double at first, in its incomplete form, before stabilizing and changing form once more, into eyes with a center pupil and three adjacent pupils that appear as a trio of tomoe that encircle the main pupil.

Behind the Scenes
This article is loosely based on the Sharingan from the anime and manga series, Naruto.