It is the most common malignant intraocular tumor in adults, accounting for the highest incidence of intraocular tumors in foreign countries and the second highest in China after retinoblastoma. The etiology of this disease is very complicated, and if not treated in time, the consequences are unimaginable, which will directly affect the visual function, appearance and quality of life of patients, and in serious cases, endanger the lives of patients. Therefore, timely treatment is necessary. In addition to active treatment, prevention is also very important in daily life, so how can we avoid the central dark spot and the change of refractive error? Prevention: 1. Patients promptly treat cough and keep bowel movement smooth. Due to the increased brittleness of capillaries in the middle-aged and elderly, repeated excessive forceful coughing and dry stools may induce blood vessel rupture. 2. Prevent hypertension and keep blood pressure stable. If your blood pressure is usually high, you should take your medication on time according to your doctor’s advice to avoid large fluctuations in blood pressure. 3.In terms of preventing orbital disease and eye tumor, arteriosclerosis should be prevented. This is an extremely complicated issue related to genetics, diet and living habits. 4. Keeping emotional and blood pressure stable is direct prevention, and keeping emotional stability is indirect prevention. Because, excessive anger and excitement easily cause blood pressure to rise. Excessive sadness and sorrow, in turn, can cause spasm of small blood vessels, which may become the cause of tumor. 5, to develop good habits, should avoid smoking and alcohol, long-term smoking can contribute to atherosclerosis. A large amount of smoking within a short period of time can cause spasm of small blood vessels throughout the body and increase blood pressure. Therefore, excessive smoking and alcohol can be a factor to induce tumor.