Naruto Shippuden Episode 338 -

: Itachi successfully traps Kabuto in Izanami , a forbidden Uchiha dōjutsu that creates an infinite loop of events within the target's mind.

: Using Izanami costs the user the sight in one of their eyes, rendering it permanently blind. Naruto Shippuden Episode 338

For a full breakdown of the series and which episodes are essential, you can check the Naruto Shippuden Filler List on Yahoo Entertainment or find detailed summaries on the Narutopedia Fandom page. : Itachi successfully traps Kabuto in Izanami ,