Kakashi got his left eye from obito....they are not brothers so it did not prevent either of then from not goi g blinnd...after kakashi kills rin that is when the MS is unlocked for both of them...there is no evidence anywhere hat says kakashi is immune and it doesnt matter either way, kakashi has his right eye which will not be effected since it is not a sharingan, he never uses his left eye unless for fighting so it probably would not bother him. And it was never said that you couldnt use the sharringan even when yoj go blind...its not like you lose the power just the eye sight so he could easily just use his right eye to see and still harness the power of the sharringan through his blind eye....he is the copy ninja so its not like he couldnt addapt...as of now he is no t blind and he will probably die before the manga is over....for good this time no pain to save him. Thats off topic....anyways kakashi is the first person to have a sharingan that isnt a uchiha other than donzo...but donzo was. Different story....and just bc kakashi died does not mean he should have an EMS....thata slightly retarded to even think about. Obito is a blank book bc there reall is no backstory as to how he is so ****ing pimp with his MS and how he is abld to use it without even using it if you know what I mean...it could be bc the firsts cells are in him and that could be why he is not going blind....he cojldnt have already been blind bc when he fought as tobi he had his empty left eye covered....
How dafuq was tobi so old when he fought the fourth hokage and when he summoned the ninetails
Have u been reading the same manga as everyone? if so then u would know why he was bigger when he fought the 4th hokage... he was in the shell of the spiral zetsu plus the cells of Hashi. Being in that shell made him look bigger, its abit like putting ur phone in a phone case, it appears to be bigger than it is. So that is the case with Obito when he was in the body of the android spiral one. get it? if not ask Kishi, I will give u his phn number soon, that is if he even picks up, he might drop the phone on ur head loool
However, going back to Kakashi's eye; I dont think he is going blind because he hasn't been rash on his eye like Sasuke or Itachi... he rarely uses his MS, most times he is just on normal 3 tome sharingan apart from when he tried to kill Diedara. like tobi said, if over use the sharingan meaning MS it starts to loose its sight... even Itachi explained that the more u use the huge powers of MS the quicker u will loose ur light which is the cost of obtaining such eye prowess. We can all agree that Sasuke was over using his eyes in a very short period... by fighting the Kages as soon as he got it, and then Danzo and then against team 7. If he rested it could have recovered a little bit but he just decided that there was no point resting since he had Itachi's eyes at his disposal.
If u consider people that had MS in the story, it took years and years for their eyes to actually loose its light apart from sasuke who was too rash on it.