Proptosis true Eyeballs bulging out SNOMEDCT_US:18265008 Ocular proptosis HP:0000536 UMLS:C0015300 An eye that is protruding anterior to the plane of the face to a greater extent than is typical. Bulging eye Protrusio bulbi Protruding eyes HP:0000520 Some sources define "exophthalmos" as a protrusion of the globe greater than 18 mm and "proptosis" as a protusion equal to or less than 18 mm. Others define "exophthalmos" as protusion secondary to endocrine dysfunction and "proptosis" as any non-endocrine-mediated protusion (Source: Wikipedia). This finding should be distinguished frm underdevelopment of the supraorbital ridge or maxilla/zygoma. In proptosis, the globe is anteriorly protuberant to the overall plane of the face. Exophthalmos UMLS:C1848490 HP:0000645 HP:0000644 Anterior bulging of the globe of eye HP:0007711 UMLS:C1862425 Anterior bulging of the globe Prominent globes HP:0007870 UMLS:C1837760 Prominent eyes Abnormal eye morphology