Sasuke eye can't be deactivated due to it being new to him and possibly due to it being an implant.
The manga shows that those who gain EYE Prowess through means other than unlocking it fully themselves can't deactivate the eye.
Example:
Nagato (Rinnegan)
Danzo (Sharingan)
Kakashi (Sharingan)
Ao (Byakkagan)
Sasuke just got the eye and is learning how to properly use it and control it so until he does that he can't deactivate it and must close his eye
Thoughts?
The manga shows that those who gain EYE Prowess through means other than unlocking it fully themselves can't deactivate the eye.
Example:
Nagato (Rinnegan)
Danzo (Sharingan)
Kakashi (Sharingan)
Ao (Byakkagan)
Sasuke just got the eye and is learning how to properly use it and control it so until he does that he can't deactivate it and must close his eye
Thoughts?