It's because you're not even understanding the basics of the manga, correcting you at every turn isn't my job.
>Shisui's eye still being effective after being covered.
Just like how Kakashi's sharingan is always in use, even when the head band covers it? Am I right? It's the same principle as that.
The sharingans on his arm aren't connected to his brain, at least not directly. That's where the genjutsu truly happens, the eyes are just a passage to it. The Sharingan on his arms literally serve no purpose other than Izanagi,
You must be registered for see links
(
You must be registered for see links
, but I don't see the logic in it,) when looking at his good eye.
Just having eyes on his arm doesn't mean they will directly connect to the brain, brah. It's basic shit.