eye cancer cell intraocular melanoma cell BTO:0000585 BrendaTissueOBO Cancer cell of the part of the eye called the uvea, which is composed of the iris (the colored part of the eye), the ciliary body (a muscle in the eye), and the choroid (a layer of tissue in the back of the eye). It is a type of MELANOMA and a very rare cancer, but the most common form of EYE CANCER in adults. If melanoma starts in the iris, there may be a dark spot on the iris. A symptom of melanoma in the ciliary body or choroid may be blurry vision. ocular melanoma cell melanoma cell