Extraocular Motility Testing in the Setting of Sudden-Onset Headache and Binocular Vertical Diplopia

In a young patient with a sudden-onset headache and binocular vertical diplopia, extraocular motility testing in the first part of the video demonstrates minimal limitation of the left eye when looking downward while the eyelids are elevated. In the second part of the video, the left eye appears to drift upward when doing the alternate cover test; as the right and left eyes are alternatively covered, when the left eye is uncovered and right eye is covered, the left eye appears to move from a slightly upward gaze to one that is more straight ahead. Click the Related Article link for full details.