Board Thread:Theories and Speculation/@comment-1512913-20170115120652/@comment-25122992-20170117120929

The same way he used Susanoo - with no eyes at all. Besides, he continued to use chakra absorption (on Hashi to gain his senjutsu chakra and on some alliance shinobi to steal chakra from his Kurama/Naruto shroud), so either the Rinnegan itself was already unnecessary or Madara had chakra absorption skills even without it.