How can Obito use S/T ninjutsu with a base sharingan?

[Boskarta]

your eyes do not change color when you go blind

People don't have eyes that turn red and gain tomoe and morph in to different shapes...

And they kind of do it depends on the blindness, your eyes can go white.


When he was fighting the Konoha 11 though, surely one of them would have noticed his MS...?

I would prefer your explanation slashestranged with it being his mastery of it rather than it just having been hidden in stupid ways.
When he uses kamui now his MS isn't hidden, so why was it back then? Other than to hide his eye it's stupid.

 

[oShux]

your eyes do not change color when you go blind

in Naruto it does ._.

 

[Meekz89]

I just cant believe so much people didn't know it was Obito. After Kakashi Gaiden there was no doubt in my mind Tobi was obito. At the end even when the rocks crumble he was still talking. Then Kishi put so much emphasis on the right eye of the mask. Even though he had 2 sharingan when he fought konan, his mask was only focused on the right.