Board Thread:Theories and Speculation/@comment-29769110-20170412161636/@comment-25122992-20170412165932

Because this was a fake Rinnegan created by Edo Tensei body. His entire body was revived into the living state via Rinne Tensei, but since these were fake eyes and his actual Rinnegan eyes were still somewhere else (the left eye was owned by Obito and the right one was hidden), it left Madara without any eyes at all until he got them back again.