Preoperative diagnosis of correction of exophthalmos (goldfish eye). Bilateral non-inflammatory exophthalmos are mostly endocrine exophthalmos, followed by hematopoietic tumor-green tumor. Rare cases such as congenital orbital malformation (pointed deformity) and so on. Bilateral inflammatory exophthalmos is found in pseudotumor and cavernous sinus thrombosis. Unilateral inflammatory exophthalmos is found in orbital cellulitis, orbital periostitis, panophthalmia, pseudotumor, lacrimal adenitis and so on. Unilateral non-inflammatory exophthalmos is more common in orbital tumors. Including benign and malignant. Malignant patients develop rapidly, suffer from severe pain, edema of eyelids and bulbar conjunctiva, early eye movement can be limited, and local lymph nodes are swollen. X-ray examination can understand the changes of bone and orbital cavity and optic canal. Benign tumors can enlarge the orbit, proliferate or absorb bone due to long-term increase of orbital pressure. Bone destruction indicates malignant tumor. If there are calcified spots on plain film, they can be found in retinoblastoma, hemangioma and meningioma. The enlargement of optic foramen suggests that retinoblastoma has metastasized to the brain through the optic nerve. Optic glioma or optic nerve sheath meningioma can also have this manifestation. Ultrasonic exploration has good soft tissue resolution. Orbital fat, optic nerve, extraocular muscle and superior ophthalmic vein can be displayed. For example, multiple extraocular muscles are hypertrophy, and there are many echoes in the muscles, which is often GraVes' disease. The presence of weak echo or anechoic region in strong echo light cluster can be used as the diagnostic standard of tumor. CT scan has high density resolution and spatial resolution. Intraorbital diseases such as tumor, inflammation and vascular malformation all show high-density shadows, and the structures in the eye, orbit and orbit can be displayed. Magnetic resonance imaging is basically the same as CT, and its soft tissue resolution is better than CT. R camera scintigraphy and ECT can observe the metabolic process of cell absorption, utilization and excretion of nuclides, but they are rarely used except for detecting metastatic cancer because of the poor selectivity of each lesion to absorbed nuclides. DSA selective angiography is an essential method to diagnose arteriovenous thinness and observe the blood supply of tumor.