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.
Tunnel Mining. Some emeralds are harvested through tunnel mining, which involves digging a tunnel through the earth's surface to a vein of emerald-bearing rock. These tunnels can be very smallâlarge enough to fit just one person and a pickaxe. Or they can accommodate larger equipment.