Monocular elevation deficiency of the left eye. Top row, No voluntary elevation of the left eye above horizontal. Second row, Hypotropia of the left eye across the horizontal fields of gaze. Third row, Depression of the left eye is unaffected. Bottom left, Ptosis (true and pseudo-) of the left upper eyelid during fixation with the right eye (in the top 3 rows, the left upper eyelid is elevated manually). Bottom center, Persistence of ptosis and marked secondary overelevation of the right eye during fixation with the left eye. Bottom right, A partial Bell phenomenon, with the left eye elevating above the horizontal on forced eyelid closure.