Cavernous hemangiomas are the most common intraorbital tumors found in adults. These benign, vascular lesions are slow growing and can manifest as a painless, progressively proptotic eye. Most of these tumefactions are exceedingly unilateral. Bilateral cases have been reported but are rare.
Orbital cavernous angiomas can increase intraorbital volume with a resultant mass effect. Although cavernous hemangiomas are histologically benign, they can encroach on intraorbital or adjacent structures and can be considered anatomically or positionally malignant. Visual acuity or field compromise, diplopia, and extraocular muscle or pupillary dysfunction can result from compression of intraorbital contents by the angioma. Lagophthalmos can result in exposure keratopathy, keratitis, and corneal perforation.
Henderson reported an incidence of 4.3% among orbital neoplasms. 
The morbidity associated with cavernous hemangiomas is the threat of compressive optic neuropathy, extraocular muscle dysfunction, and cosmetic disfigurement.
Mortality can result from intraoperative complications, such as bleeding and the risk of general anesthesia.
No predilection exists for race or ethnicity.
Patients usually manifest symptomatically during the third to fifth decades of life.