Why does Tobi have a Sharingan with Kamui ability after having used Izanagi?


As per my understanding, Izanagi permanently blinds the Sharingan's vision
once used. Tobi (Obito) donated one eye to Kakashi, and used Izanagi with the
other eye to escape from Konan's paper bombs. This means he should only have a
Rinnegan now, but why does he still have a Sharingan with Kamui ability?

Note: I do not read manga.




Tobi assisted Itachi in the Uchiha clan massacre, and collected several
Sharingan eyes of the dead Uchiha clan members. He must have implanted one of
these Sharingan eyes in his left eye socket.

During the battle with Konan, he has two Sharingan eyes. He did not use his
original right eye for the Izanagi, but the left eye, which can be seen
"losing its light" (closing) as he is talking to Konan. See images below
(taken from Chapter 510).

![Tobi has two Sharingan eyes](https://i.stack.imgur.com/mBHVd.png)

![Left eye loses its light](https://i.stack.imgur.com/JiPkc.png)




Tobi assisted Itachi in the Uchiha clan massacre, and collected several
Sharingan eyes of the dead Uchiha clan members. He must have implanted one of
these Sharingan eyes in his left eye socket.

During the battle with Konan, he has two Sharingan eyes. He did not use his
original right eye for the Izanagi, but the left eye, which can be seen
"losing its light" (closing) as he is talking to Konan. See images below
(taken from Chapter 510).

![Tobi has two Sharingan eyes](https://i.stack.imgur.com/mBHVd.png)

![Left eye loses its light](https://i.stack.imgur.com/JiPkc.png)

