Optic nerve grey crescent.
Jonas
J B
JB
D005260:Female; D006801:Humans; D008297:Male; D009898:Optic Disk / Q000473:pathology*; D009901:Optic Nerve Diseases / Q000473:pathology*; D010857:Pigment Epithelium of Eye / Q000473:pathology; D012590:Sclera / Q000473:pathology