Exophthalmos(redirected from exophthalmus)
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protrusion of the eyeball. Exophthalmos is most commonly caused by diffuse toxic goiter. It may also be caused by a tumor in the eyeball or adjacent regions, trauma of the eyeball, thrombosis of the orbital veins, and inflammatory diseases. If pronounced, exophthalmos may be accompanied by limited mobility of the eyeball and impairment of vision. Therapy is based on the cause of the condition.