May Be Caused by

 Common

Cavernous hemangioma

Dermoid

Extraconal meningioma

Graves disease

Hematoma

Lacrimal gland tumor

Lymphoma

Optic nerve sheath meningioma

Orbital pseudotumor

Plexiform neurofibroma

Schwannoma

 Uncommon

Amyloidosis

Arteriovenous malformation

Bacterial infection

Breast cancer

Brown tumor of hyperparathyroidism

Ewing sarcoma

Langerhans cell histiocytosis

Leukemia

Lipoma

Lung carcinoma

Lymphangioma

Myeloma

Neuroblastoma

Sarcoidosis