The Eye of Ender (or Ender Eye) is a craftable item used to locate and activate an End Portal. Eyes can be used to activate End Portals by being placed into empty End Portal Frames until the entire ring of 12 Frames are filled, thereby activating the End Portal. They are used as an aid in finding the End Portal by leading the player to an End Portal Frame inside of a Stronghold by right clicking, which will throw the Eye of Ender.