Figure 5.

Four strategies for ocular realignment. A, A 35-year-old man with left eye dominance. Strategy 1: After the nondominant right eye was uncovered at t = 0 seconds,it made a vergence-like adducting movement. Strategy 2: After the dominant left eye was uncovered, an alternating saccade was made, followed at variable intervals by a vergence-like movement of the right eye. Blinks have been removed (Supplementary Video 1, available at www.aaojournal.org). B, A 31-year-old man with left eye dominance. After the right eye was uncovered, strategy 1 was employed. Convergence (small arrow) was faster than divergence (large arrow), which occurred with subsequent episodes of fusion loss. Strategy 3: After the left eye was uncovered, a disconjugate saccade (much larger in the adducting, left eye) was made, followed by vergence movements (arrows). The vergence movement was larger in the nondominant right eye. C, An 11-year-old girl with right eye dominance. Strategy 4: After the dominant eye was uncovered, an alternating saccade was made to bring it onto the target (first stage of strategy 2). This was followed by a disconjugate saccade and asymmetrical vergence movement (strategy 3). After the left eye was uncovered, this child used strategy 3 to recover fusion.