Choroidal melanoma is a common malignant tumor in the uvea, most commonly seen in the age group of 40-60 years, independent of gender or right or left eye, and can occur in any part of the choroid, but commonly in the posterior pole of the eye. Epidemiology Choroidal melanoma is the most common intraocular malignancy in adults, with an ocular population incidence of 0.02%-0.06%. The incidence in China is second only to retinoblastoma, which occurs in children, and is the second most common intraocular tumor site: choroid is the most common, accounting for 78%-85%, followed by ciliary body, accounting for 9%-12%, and iris, accounting for 6%-9.5%. Eye differentiation: left and right eyes are similar. Mostly monocular onset, bilateral is rare. Race: The ratio of colored to white prevalence is 1:165-1:250 Geography: North America is the most prevalent, followed by Europe, Asia and Latin America, and Africa is rare. Age of onset and gender: The age of onset is reported to be as young as 7.5 months and as old as 70 years, with an average of 40-50 years, while 51-60 years is the age of prevalence for males slightly more than females, accounting for about 56%. Neurofibromatosis, nevus and congenital ocular melanosis can contribute to the development of this disease. Prevention Choroidal malignant melanoma is generally a highly malignant tumor, and early diagnosis and early removal of the eye is the primary treatment. There are no specific preventive measures.