Peripheral ring opacity of the cornea.
D000368:Aged; D003315:Cornea / Q000473:pathology; D003318:Corneal Opacity / Q000473:pathology; D003886:Descemet Membrane / Q000473:pathology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D014785:Vision, Ocular