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.
How to Choose High Quality Emeralds. There are many varieties of colored gemstones. One of the most popular is the emerald, a deep green stone that is harder than quartz and softer than ruby, sapphire, or diamond. Emeralds are found all over the world and are mined in locations such as Zimbabwe, Madagascar, Zambia, Brazil, Indiana, Afghanistan, Russia, and Pakistan.