Sharingan

The Sharingan is a dōjutsu kekkei genkai, which appears in some members of the Uchiha clan. It is one of the Great Three Dōjutsu (大三瞳術, Daisan Dōjutsu; Literally meaning "Great Three Eye Techniques"), along with the Byakugan and the Rinnegan. The Sharingan is also called "Heaven's Eye" (天眼, Tengan), because of the many abilities it grants the user.[1]