Hi, thanks for using the ehealth forum for your query.
You seem concerned by the damage to optic nerve.
Damage to the optic nerve typically causes permanent and potentially severe loss of vision, as well as an abnormal pupillary reflex, which is diagnostically important. The type of visual field loss will depend on which portions of the optic nerve were damaged. Generally speaking:
Damage before the optic chiasmas causes loss of vision in the visual field of the same side only.
Damage in the chiasma causes loss of vision laterally in both visual fields (bitemporal hemianopsia). It may occur in large pituitary adenoma.
Damage after the chiasma causes loss of vision on one side but affecting both visual fields: the visual field affected is located on the opposite side of the lesion.
Injury to the optic nerve can be the result of congenital or inheritable problems like Leber's Hereditary Optic Neuropathy, glaucoma, trauma, toxicity, inflammation, ischemia, infection (very rarely), or compression from tumours or aneurysms. By far, the three most common injuries to the optic nerve are from glaucoma, optic neuritis (especially in those younger than 50 years of age) and anterior ischemic optic neuropathy (usually in those older than 50).
At present there is nothing to offer in treatment if optic nerve is damaged. There may be some hopeful techniques in future that may help like stem cell transplants, nanotechnology and electric retinas.
There is nothing to fear to see anything if the optic nerve is damaged.
Hope this helps. Take care.
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