Board Thread:Theories and Speculation/@comment-25122992-20170404175224/@comment-25122992-20170404203607

Madara's case was "special", since Kabuto tampered with his body to return its youthful appearance and strength. Also, we already witnessed that Edo Tensei on its own cannot bring back something that the person was already missing during their lifetime or even shortly before their death (like Nagato's pre-criplled state or Raikage's state without the scar he got from himself). Moreover, Hizashi's Byakugan eyes for example aren't missing because they were sealed by the cursed seal only after his actual death, that's why they remained. Either way, if Edo Tensei creates fake tissies, all of them must've been revived in the living form after the Rinne Tensei because technically it revived Edo-body as a whole, yet somehow eyes became an exception.