Kamui not ms?

[Meee]

Basically what @Owarij said Tobi's eyes were always blacked out when using Kamui

 

[narmeiter]

how do you know kakashi isn't getting blurring? you do realize he has a perfectly good eye that isn't going blind... he's accustomed fighting with one eyed as well.. why would he complain?

he already hinted to itachi his eyesight is deteriorating

Because we have not beenshown in the manga that it is since he started using kamui.
He would be a pale shadow of himself without sharingan. So, he is bound to complain if its worsening.

 

[Namikaze Senju]

if it is kamui they both use their ms and about obito's intagibility he does use is ms too bcos in the begining when obito's ms first awakened he used it to fight those hidden mist ninjas while it was still on

 

[thegame]

Obito doesn't need it, cause if he did, it had been obvious 3 years ago that Tobi = Obito

That is the best answer you will ever get, cause Kishi wont explain it in other ways. And tbh I am more than satisfied with this explanation, since it's perfect for the plot. And can be justified in many other ways, if Kishi wants to.

 

[zinescience]

obito does

 

[Namikaze Senju]

obito needs ms to be intagible