What causes Hemianopia and what are the Symptoms?
Conditions or injuries that affect the optic nerve can cause hemianopsia. The sequelae (aftereffects) of stroke, brain aneurysm, occlusion of the optic artery, brain tumors, or psychological-trauma” traumatic head injuries can all result in hemianopsia. Occasionally, individuals who suffer from migraine headaches may experience hemianopsia during a migrainous episode or as part of the prodromal aura that precedes the actual headache. This type of hemianopsia resolves completely upon resolution of the headache. Transient hemianopsia can result from bouts of extremely high blood pressure (as occurs in eclampsia) or during or after a seizure. Other rare causes of hemianopsia include infections, such as encephalitis, brain abscess progressive multifocal leukoencephalopathy and creutzfeldt-jakob-disease. Symptoms of hemianopsia involve the inability to see objects in half of the visual field of one or both eyes, which may be manifested by reading difficulties, problems walking through crowd
