Chiyugan

The Chiyugan is a rare Kekkei Genkai shown only in Medic-nin who have a naturally high Chakra Reserve. It stores a portion of the owner's Chakra into the Eyes and is released when performng Medical Ninjutsu. It is only activated once a Ninja has run out of Chakra while attempting to heal someone. This technique causes the eyes to glow a purple-ish color once activated.