

As I understand, any physical part of a reanimated person cannot be destroyed.
It will be regenerated automatically within a short time. Then, why did Itachi
lose his eyesight after using Izanami? He should've got the eye back quickly
as he was a reanimated person. Or, he could've damaged his own eye with a
kunai, so that he would get a fresh Mangekyo Sharingan.


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naruto
Why did reanimated Itachi lose eye vision after using Izanami?


The effect of using Izanami is that you lose **use** of an eye - that is, the
user becomes blind.

The eye is there - it has not been lost. Itachi is simply now blind in that
eye.


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> Q. _Any physical part of a reanimated person cannot be destroyed._

The eye was not destroyed at all. It just lost its light forever. As stated in
the [wiki](http://naruto.wikia.com/wiki/Izanami) (emphasis mine)

> It is a genjutsu which affects the target through physical sensations shared
> between them and the user. Like its counterpart, in exchange for the
> temporary ability that it grants the user, **the Sharingan with which
> Izanami is cast is rendered blind and loses its light forever.**

* * *

> Q. _It will be regenerated automatically within a short time._

Since the eye was never destroyed, it did not regenerate.

* * *

> Q. _He could've damaged his own eye with a kunai, so that he would get a
> fresh Mangekyo Sharingan._

The light of the eye was already lost. Even if Itachi were to destroy it with
his own kunai, the regenerated eye would still have been the one without its
light.

Also, it should be noted that Itachi did not want to stay in the living world
anymore, as he had no more attachments with the living (after telling the
truth to Sasuke). Therefore, Itachi would never have tried it at all in the
first place.


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