Exclusion : Orbital bone (170.0); Carcinoma in situ (234.0); Malignant neoplasm of eyelid (skin) (173.10-173.19); Malignant melanoma of eyelid (skin) (172.1); {cartilage (171.0)}; Dark area on retina and choroid (239.81); Retinal freckle (239.81); Optic nerve (192.0);