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- Feb 4, 2013
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I have a theory on why obito and kakashi don't go blind. When they use kamui they open a portal to another dimension. They're eyes are the portal itself the portal is split between two dimensions the real world and kamui. The portal is in between the two dimensions and is not effected by time nor space. Therefore since the eye is not effected by time nor space it won't bleed or deteriorate.
....kakashi doesnt have two pair of eyes