(See also Introduction to Eye Socket Disorders Introduction to Eye Socket Disorders The eye sockets (orbits) are bony cavities that contain and protect the eyes and their supporting structures (see figures An Inside Look at the Eye and Structures That Protect the Eye). Disorders... read more .)
Tumors can form within the tissues behind the eye or can spread from an adjacent nasal sinus (air-filled cavity behind the nose). Cancerous tumors from elsewhere in the body can also spread (metastasize) to tissues behind the eye.
These tumors can push the eye forward and cause it to bulge abnormally (a finding called proptosis Eyes, Bulging Bulging or protruding of one or both eyes is called proptosis or exophthalmos. Exophthalmos is usually used when describing bulging eyes caused by Graves disease, a disorder causing overactivity... read more 
). Pain, double vision, droopy eyelid, and vision loss may also occur.
Computed tomography Computed Tomography (CT) and Magnetic Resonance Imaging (MRI) A variety of tests can be done to confirm an eye problem or to determine the extent or severity of an eye disorder. Each eye is tested separately. In general, angiography involves injecting... read more (CT), magnetic resonance imaging Computed Tomography (CT) and Magnetic Resonance Imaging (MRI) A variety of tests can be done to confirm an eye problem or to determine the extent or severity of an eye disorder. Each eye is tested separately. In general, angiography involves injecting... read more (MRI), or both are done to obtain an image of the tumor and exclude other abnormalities. Usually, a sample taken for examination under a microscope (biopsy) is needed to determine what type of tumor is present, and treatment depends on these results.
Treatment depends on the type of tumor. For benign tumors, treatment, if required, may include drugs, laser therapy, or surgical removal. Malignant tumors may require surgical removal, radiation therapy, chemotherapy, or a combination.
