May Be Caused by

 Common

Intracranial meningioma

Optic glioma

Optic nerve sheath meningioma

Optic neuritis

 Uncommon

Arteriovenous malformation

Central retinal vein occlusion

Connective tissue disease

Cyst of optic nerve sheath

Dural ectasia

Fungal disease

Granulocytic sarcoma

Graves disease

Hemangioblastoma

Hemangioma

Hemangiopericytoma

Hematoma

HIV-related optic neuropathy

Increased intracranial pressure

Leptomeningeal carcinomatosis

Leukemia

Lymphoma

Melanoma

Metastasis

Multiple sclerosis

Neurofibroma

Ophthalmic artery aneurysm

Optic nerve ischemia

Orbital pseudotumor

Orbital varix

Radiation-induced optic neuropathy

Retinoblastoma

Sarcoidosis

Syphilis

Thyrotoxicosis

Toxoplasmosis

Trauma to optic nerve

Tuberculosis

Venous occlusion

Wyburn-Mason syndrome