Board Thread:Theories and Speculation/@comment-29769110-20170525101534/@comment-25122992-20170525102043

If you've watched the series attentively, then you should obviously know that Madara still had two Rinnegan eyes (as well as Nagato who possessed these eyes of Madara during his lifetime). And Madara didn't actually lost the eye itself from the Izanagi, he only lost the eyesight of it, while it was seemingly restored when he awakened the Rinnegan.