| embryotoxon | Congenital opacity of the periphery of the cornea, a feature of osteogenesis imperfecta. Origin: embryo-+ G. Toxon, bow (05 Mar 2000) |
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| anterior embryotoxon | An opaque, grayish ring at the periphery of the cornea just within the sclerocorneal junction, of frequent occurrence in the aged; it results from a deposit of fatty granules in, or hyaline degeneration of, the lamellae and cells of the cornea. Synonym: anterior embryotoxon, arcus adiposus, arcus juvenilis, arcus lipoides, arcus senilis, gerontoxon, linea corneae senilis, lipoidosis corneae. (05 Mar 2000) |
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| posterior embryotoxon | A developmental abnormality marked by a prominent white ring of Schwalbe and iris strands that partially obscure the chamber angle. (05 Mar 2000) |