Is optic nerve atrophy serious?

Optic nerve is the image seen by the eye, transmitted to the brain through the nerve, equivalent to the wire between the eye and the brain, the optic nerve shows atrophy, that is, the image seen by the eye has no way to transmit to the brain. At this stage, there is no effective treatment for optic nerve atrophy, and the optic nerve cannot be regenerated. once it is atrophied, there is no way to return to its original state. Optic nerve atrophy will seriously affect visual function.