Barrier Talisman: Armoured Eye

This technique was created by the hunter-nin of Kirigakure and according to Ao, they are the only ones who know how to cancel the technique.Naruto chapter 471, page 6 When a specific part of the user's body is targeted, this technique is automatically activated. The talismans move to cover the specific body part and form a barrier to protect it. 
Ao wears these talismans as earrings as a precaution should anyone try and target the Byakugan in his right eye socket. These talismans have the kanji for a humble form of on both sides.
== References ==
es:Etiquetas de Barrera Protectora
pt-br:Barreira Talismã: Olho Blindado
pl:Kekkaifu: Gansōkō