Optic Nerve Atrophy is damage to the optic nerve which can affect vision. Damage may be caused by shock, toxins, poor blood flow, vitamin deficiency, and trauma, as well as diseases of the brain and central nervous system. There are also forms of hereditary Optic Nerve Atrophy that affect children and young adults.

Rarely, conditions that lead to Optic Nerve Atrophy may be treatable, but damage from ONA cannot be reversed. The underlying disease must be found and treated. Otherwise, vision loss will continue.