Traumatic optic neuropathy (TON) refers to an acute injury of the optic nerve secondary to trauma. The optic nerve axons may be damaged either directly or indirectly and the visual loss may be partial or complete.
In Minecraft, emerald ore is very hard to find and is found in small deposits in the Extreme Hills biome. You can usually find emerald ore between 13 and 31 blocks below the ground and close to lava. So if you see a pool of lava in the Extreme Hills biome, that is a great place to start mining downward.
Finding ore on Minecraft PE survival is hard! You may dig a massive mine and never find any diamonds or gold, you may only find a couple of pieces of iron and maybe some coal. This does not need to happen, I know a really cool way to find the ore you need fast. It involves you using two words on Minecraft PE using the same seed. One on creative mode, One on survival mode.