The most common retrobulbar orbital mass in adults is -
Neurofibroma
meningioma
Cavernous haemangioma
Schwannoma
Ans. is 'c' i.e., Cavernous hemangioma Cavernous hemangioma is the commonest benign orbital tumour among adults.The tumour is usually located in the retrobulbar muscle cone.It presents as a slowly progressing unilateral proptosis in the 2nd to 4th decade.Sometimes it may compress the optic nerve without causing symptoms.
Intra Ocular Tumour