The Eternal Mangekyō Sharingan is a powerful ocular ability in the Naruto series, an advanced form of the Mangekyō Sharingan. It is achieved by transplanting the Mangekyō Sharingan of a close blood relative, which prevents the deterioration of vision that typically occurs with regular use of the Mangekyō Sharingan. This ability grants the user enhanced powers, including access to unique techniques and improved abilities, such as Susanoo. Notable users of the Eternal Mangekyō Sharingan include Itachi Uchiha and Sasuke Uchiha, who utilize its strengths in battles throughout the series.