<unk>  <unk>  is a medical condition characterized by damage to the retrobulbar portion of the optic nerve due to inadequate blood flow (ischemia) to the optic nerve. Despite the term<unk> , this form of damage to the eye's optic nerve due to poor blood flow also includes cases where the cause of inadequate blood flow to the nerve is anterior, as the condition describes a particular mechanism of visual loss as much as the location of damage in the optic nerve. In contrast, anterior ischemic optic neuropathy (AION) is distinguished from<unk>  by the fact that AION occurs spontaneously and on one side in affected individuals with predisposing anatomic or cardiovascular risk factors.
Posterior ischemic optic neuropathy
Anterior ischemic optic neuropathy
Ischemic optic neuropathy
Arteritic anterior ischemic optic neuropathy
Optic neuritis
Autoimmune optic neuropathy
Retinal vasculitis
Toxic and nutritional optic neuropathy