Fig. (3) *Left L Typical eye-movement responses of patients 7 (A) and 8 (B) which demonstrated some binocular fusion capacity. Middle (M): Vergence response, (right eye-left eye). Right (R): Conjugate response, (right eye+left eye)/2.

* In the figure movement of the eye to the right is displayed downward, and movement to the left is displayed upward in the graph.