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.
One of the major mines in the county is the Emerald Hollow Mine. This a public gem mine located in the Piedmont of North Carolina in Alexander County, specifically in the town of Hiddenite. Throughout the entire United States, this is one of the only emerald mines that is open to the public to search for emeralds.