Cavernous hemangioma is the most frequent primary vascular orbital tumor in adults. This slowly evolving lesion is usually located behind the ocular globe, between the extrinsic muscles. It leads to axial exophthalmia. Surgical treatment is indicated when there is a risk of visual impairment. The prognosis is related to the size of the lesion and its extension. CT scan is rather unspecific, but MRI is highly sensitive and specific in case of progressive painless exophthalmia.