Quote Originally Posted by Id3aLiStiC
Yeah... I could have sworn rememering it was only the MS that can make you go blind if you use it oftenly.
No.......also wrong.....

Yes it's been confirmed that the overuse of mangekyou causes strain on the person's eyes, but it has never been proven that it leads to blindness. You're all just referring to residue assumptions based on the encounter between kakashi and itachi, when in reality the conversation eluded to kakashi having mangekyou, not itachi losing his vision.