Abnormal protrusion or bulging of one or both eyes from their sockets. It is most commonly associated with hyperthyroidism, particularly Graves' disease, but can result from other orbital conditions.
From Greek 'exo-' (outside) + 'ophthalmos' (eye), literally meaning 'eye outside.' The term has been used in medical literature since ancient times, with Hippocrates describing the condition in relation to thyroid disorders.
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