Many fans have been wondering if Sasuke’s Rannegan can be deactivated in the anime for a while now and the answer is yes. Sasuke and will other Rinnegan users can deactivate their Rinnegan eyes. If all the Rinnegan users could not reactive it the users would be frequently or lose chakra very fast while they would have to cover it like how Kakashi covered his Sharingan. Sasuke’s Rinnegan is also not visible because of his long hair.
However, the only characters or users who can’t deactivate the Rinnegan eye are people who have someone else’s Rinnegan eye which is not their own for example characters such as Nagato, Obito, and Edo Tensei Madara. On the other hand, Edo Tensei Madara had an artificial Rinnegan in the 4th great ninja war. Obito Uchiha however, had Madara’s real Rinnegans but Obito could not use both Rinnegan because it would be too powerful to control.
Nonetheless, the one reason why Nagato was able to use both Rinnegan’s eyes was that he’s an Uzumaki descendant so he naturally has a stronger life force than regular Shinobis. Sasuke’s at the end of his last battle with Naruto Rinnegan eye was deactivated. The Rinnegan eye will also get Deactivated if the user exerts too much chakra.
Why Sasuke Covers His Left Eye?
The main reason Sasuke covers his left eye with his hair is so that when he’s using his Mangekyo Sharingan eye, he is not wasting chakra by using his Rinnegan eye also. When Sasuke awaken his Rinnegan for the first time, he did not know how to deactivate his Rinnegan. However, he just deactivated his Eternal Mangekyou Sharingan and closed his eye so he would not waste his chakra.

Can Sasuke’s Rinnegan be deactivated?
All Rinnegan users are basically a successor of the Sharingan eye. This is fact-based by the information provided by the manga and anime. If a user transplanted a Sharingan eye in his body he or she cannot deactivate it as shown by Kakashi. This is because Kakashi inherited Obito’s eyes. However, it is not the same for a person who has awakened it naturally. For example characters such as Sasuke and Madara. Sasuke is able to deactivate it in his appearance in Naruto the Last movie and Madara has been masterfully deactivating hid Rinnegan because he was constantly switching between the Rinnegan and his Mangekyou Sharingan.
The original users who awakened their Rinnegan naturally such as Madara and Sasuke can most likely deactivate it. However, users who had the Rinnegan eye transplanted such as Obito and Nagato/Pain cannot deactivate it. Nonetheless, the reason someone such as Obito and Nagato did not cover their Rinnegan is different for each. Nagato’s bloodline belongs to the Uzumaki clan and has a very powerful chakra, therefore he can afford to keep it activated the whole time. Obito on the other hand has Hashirama’s cells transplanted in his body along with his Uchiha heritage that gives Obito enough chakra to keep the Rinnegan running.
Conclusion
So the question of can Sasuke deactivates his Rinnegan comes down to the true users of either the Sharingan or the Rinnegan that determines who can deactivate it, while those who had it transplanted in their body cannot deactivate the eye because they do not have proper control over it.
Finally, it all comes down to only the natural Dojutsu users like Itachi’s Sharingan and Hinata’s Byakugan eyes can deactivate their Dojutsu and keep it off for a while. Users with transplanted Dojutsu such as Kakashi of the Sharingan cannot completely deactivate their Dojutsu eye and they must keep their eyes covered to avoid the constant drain of chakra.
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