Mangekyou Sharingan

[Stampy]

That would explain why madara wears the mask, to keep the fact that he'd has 4 eyes a secret. That would keep others from achieving ems.

No cause we saw at least half of his face, (when he uncovers it to Sasuke) and the top half of his face also (when the top half breaks against Konan.) and there was only 2 eyes there to be seen. Who knows maybe they fused together hu

 

[Floydical]

Well said then, see I knew there was something to it, which is why I never posted lol... But then I just don't understand HOW did they make it work? How do you transplant eyes and keep your old ones at the same time ?!

It does seem that the 4 eyes essentially become 2. We know for a fact from that chapter that you need the 4 eyes to gain the EMS. If you think about it, this means that the 2 original cannot be removed from the body. Since we know Madara gained the EMS and still had the appearance of 2 eyes, it must mean that the 4 basically became two by putting the 2 new eyes over his two old eyes. Of course, this does not make a lot of sense and the details have not been explained making it an ambiguous situation, but we have to assume from this chapter that a switch is simply not adequate for them both to gain EMS.

 

[PositiveEmotions]

It does seem that the 4 eyes essentially become 2. We know for a fact from that chapter that you need the 4 eyes to gain the EMS. If you think about it, this means that the 2 original cannot be removed from the body. Since we know Madara gained the EMS and still had the appearance of 2 eyes, it must mean that the 4 basically became two by putting the 2 new eyes over his two old eyes. Of course, this does not make a lot of sense and the details have not been explained making it an ambiguous situation, but we have to assume from this chapter that a switch is simply not adequate for them both to gain EMS.

i do not think thats possible to put 2 eyes over the users original 2 eyes

 

[Floydical]

i do not think thats possible to put 2 eyes over the users original 2 eyes

I said myself that it didn't make sense, but it seems that that is the only explanation for having 4 eyes but only looking like you have two. As someone said before and I agree with, perhaps the eyes merge with one another to become an EMS. Either way, I really think Kishi did not intend for people to over think things like this. The fact is, a transplant must be done for EMS to be obtained and its a one way street. That means that when exchanged between brothers, one will gain the EMS and the other will loose his eyes forever and die as a result. Again this is ambiguous since we know simply loosing your eyes would not kill you if you get treated, but that is the fact of the manga.

 

[PositiveEmotions]

i think as it happened with sasuke they removed sasuke's eyes and put itachi's eyes on sasuke so he can have ems

also obito gaved his right eye to kakashi so same thing was with him and he has ems but his not an uchiha he had implanted eye in him so i guess its save to say u do not have to be an uchiha to have access to uchiha powers now even naruto has hiddin uchiha powers from itachi