Teaching File - Proptosis & CTscan ...

Proptosis is the abnormal protrusion of the globe; exophthalmos is the abnormal prominence of the globe. On imaging, proptosis is best evaluated at a level of the lens on axial images. A line connecting the most distal tips of the lateral orbital walls is drawn. The distance from the anterior margin of the globe to this line should not exceed 21 mm.
Haaga/ 2009/ page 478
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A case of thyroid orbitopathy with pronounced extraoccular muscle enlargement and low density as well as proptosis.