Board Thread:Naruto Discussions/@comment-4704473-20140625072535/@comment-3568954-20140626072335

sasuke did not call her eye the Rinnegan. he called Madara's eye the Rinnegan. the third eye reflects the inner soul. madara has the Rinnegan so his third eye is a Rinnegan. Hagoromo is kaguya's son and would know exactly what her eyes are he said it is a sharingan therefore its a sharingan there is no ifs ands or buts