Ophthalmoplegia Internuclear ophthalmoplegia 2016-03-17T07:19:02Z An abnormality of conjugate lateral gaze in which the affected eye shows impairment of adduction. The pathognomonic clinical sign of internuclear ophthalmoplegia is an impaired adduction while testing horizontal saccades on the side of the lesion in the ipsilateral medial longitudinal fascicule. UMLS:C0152134 SNOMEDCT_US:49823009