Choroidal melanoma is a type of cancer that occurs in the choroid, a layer of blood vessels and connective tissue between the retina and the sclera in the eye. This condition is the most common primary eye cancer in adults and typically arises from melanocytes, the cells that produce pigment. Symptoms may include blurred vision, visual disturbances, or a noticeable dark spot in the eye. Diagnosis often involves imaging tests such as ultrasound, CT scans, or MRI to assess the tumor's size and location. Treatment options may include radiation therapy, surgery, or laser therapy, depending on the tumor's characteristics and the patient's overall health. Early detection is crucial for better outcomes.