How can Itachi use his Mangekyō Sharingan after death? When Naruto was forced to fight Itachi for the first time when he was reanimated by Edo Tensei, you could clearly see that he could still use the power of his Mangekyō Sharingan. How is this possible if Itachi no longer had his original eyes (which Sasuke took it)? Does this mean that Edo Tensei can also restore certain aspects of a ninja even after death?
As it comes straight from the Naruto wikia:

Edo Tensei




  The Summoning: Impure World Reincarnation binds the soul of a deceased
  person to a living vessel, restoring them as they were when they were
  alive in order to do their summoner's bidding.


So that's why Itachi had both of his eyes, because he was restored in the state before he died, which he had both of his eyes.