Uveal melanoma is a type of eye cancer in the uvea of the eye.[3] It is traditionally classed as originating in the iris, choroid, and ciliary body, but can also be divided into class I (low metastatic risk) and class II (high metastatic risk).[3] Symptoms include blurred vision, loss of vision or photopsia, but there may be no symptoms.[4]

Reference
Wiki: Choroidal melanoma