Sharingan

The  Sharingan (写輪眼; Literally meaning "Copy Wheel Eye", Meaning ( Viz) "Mirror Wheel Eye") is a  dōjutsu  kekkei genkai, which appears in some members of the  Uchiha clan. [1]  It first manifested in  Indra, the earliest ancestor of the Uchiha clan, and later became regarded as one of the Three Great Dōjutsu (三大瞳術,  San Daidōjutsu; Literally meaning "Three Great Eye Techniques"), along with the Byakugan and the  Rinnegan. [2]  The Sharingan is also called " Heaven's Eye" (天眼,  Tengan), because of the many abilities it grants the user. [3] <span style="font-family:'OpenSans',Verdana,Arial,sans-serif;line-height:23.799999237060547px;">  Tobirama Senju<span style="font-family:'OpenSans',Verdana,Arial,sans-serif;line-height:23.799999237060547px;"> defines it as the "eye that reflects the heart" (心を写す瞳,  Kokoro o utsusu hitomi<span style="font-family:'OpenSans',Verdana,Arial,sans-serif;line-height:23.799999237060547px;">). <sup class="reference" id="cite_ref-3" style="font-family:'OpenSans',Verdana,Arial,sans-serif;">[4]