why kakashi won't go blind

[karay]

i'm now inclined to think that kakashi's sharingan is EMS because it's not his in the first place. well, who knows, it might be EMS. and when he asked itachi about itachi's MS, it was not just to know how dim itachi's MS has gone but also because he is confirming that MS really makes the user blind, probably because his sharingan is not experiencing that.

 

[Prime Rib]

regardless of the time the MS will lose its light

 

[uncle sam]

Ms loses light from the instant you unlock it..kakashi has used it a lot i woulnt be suprised if he does go blind..btw how are him and guy still standing

 

[Owarij]

Kakashi has already greatly hinted to Itachi that his eyesight is deteriorating.. he asked itachi about his eyesight, and Itachi was able to quickly realize he unlocked Ms as well.. thus the " Kakashi san...you..couldn't have..."

Not only that, but I believe in the third databook under kamui, it flat out states he is losing vision from his ms