Board Thread:Naruto Discussions/@comment-4370692-20140515060658/@comment-9782468-20140516001823

Sasuke awakened his Rinnegan from obtaining chakra directly from the Sage of Six Paths himself. I don't think it's the Jyuubi eye. I think it's just an overlapping Rinnegan and Sharingan eye. So he has two Sharingan, with one Rinnegan overlapping his left Sharingan. Madara's third eye is a Sharingan, as it is a Sharingan that activates Infinite Tsukuyomi. However, I think it's a much more powerful one, one born from having both Rinnegan and being close to the moon. So... that's my theory lol.