Sharingan- meaning ‘The Copy Wheel Eye’ or Mirror wheel eye, allows the users to copy the Jutsu of their opponents at first glance. It also enables power and speed to the eye wielders to read the movements of their opponents. Sharingan is the Kekkei Genkai of the Uchiha clan. This is considered the ‘Greatest Dojutsu’ in Naruto. Other Dojutsu are Byakugan, and Rinnegan. Among the Uchiha clan, those who have awakened the Sharingan are seen to have mastered the copy technique and are faster with keen eyes. We have watched Sasuke and Itachi using their supreme visual prowess in Naruto during many battles. This magnificent power is activated by only the Uchiha clan and is derived from Rinne-Sharingan of Kaguya Otsutsuki. Sharingan is the eye prowess possessed by the Uchiha clan. One of the most excellent techniques of these eyes is ‘Genjutsu’ (illusion technique).
Sharingan is activated by the release of deep love or say- due to deep grief due to the loss of loved ones in the Uchiha clan.