Choroidal Nevus

A choroidal nevus is referred to as a benign tumor of choroid composed of melanocytes. A choroid is a layer present around the back of the eyes between the retina and sclera. It occurs as a grayish pigmented lesion with slightly blurred margins. It is caused due to UV-B (ultraviolet B) exposure or excess production of melanin caused by DNA (deoxyribonucleic acid) photodamage. They do not cause symptoms. In some cases, there is leakage of fluid. It can lead to retinal detachment, flashing lights, and vision loss. Rarely, it can cause melanoma. Surgery is done while having complications.