Board Thread:Naruto Discussions/@comment-24120130-20140607191120/@comment-24519434-20140613233116

If you look at Sasuke's "Rinnegan" it only has six tomoe but Kaguya and Madara's both had nine, Sasuke's tomoe represents the tomoe of his and Itachi's sharingan PLUS the Rinnegan Hagoromo gave him, the two overlap. Since Madara awakened the Rinnegan from the EMS it (the Rinnegan) is technically a realy stong sharingan, so the third eye is just an EMS with the Rinnegan instead of sharingan.