label: Inferior oblique muscle overaction
label_lc: inferior oblique muscle overaction
description: "A common ocular motility disorder characterized by vertical incomitance of the eyes in lateral gaze. In primary inferior oblique muscle overaction, an upshoot of the adducting eye occurs when gaze is directed into the field of action of the inferior oblique muscle, producing a greater upward excursion of the adducted eye than of the abducted eye."