Ischemic optic disc disease

Ischemic optico-neuropathy refers to an acute malnutrition disease in which the nutritional blood vessels of the optic nerve circulate impaired. Generally, the central retinal artery enters the optic nerve at about 9-11 mm behind the bulb as a boundary, and it is clinically divided into anterior and posterior ischemic optic neuropathy. Circulation disorder of the posterior ciliary artery supplying the optic disc causes acute ischemia and hypoxia of the optic disc, which leads to optic disc edema. Not only the optic disc, but also the sieve plate and nerve fibers behind the reticle can be involved. anterior ischemic optico-neuropaty (AION). Ischemic changes occur from the inner orbit of the optic nerve to the optic cross, which is called posterior ischemic optico-neuropathy (PION), without disc edema.