What parts of the eye can be affected by uveal melanoma?

All uveal melanoma forms in the middle layer of the eye, which is called the uvea or the uveal tract. This includes the iris (the colored part of your eye), the ciliary body (a ring of muscle that adjusts the size of your pupil), and the choroid (the layer of blood vessels that surrounds your eye). Uveal melanoma may affect any of those three parts. The most common type of uveal melanoma is choroidal melanoma, which can be further broken down into small choroid melanoma and medium and large choroid melanoma, depending on the size of the growth. Metastatic uveal melanoma can also occur, which can happen when uveal melanoma spreads to other parts of the body such as the liver or lungs.