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Non-addictively of saccades and vergence. A. Saccade-free symmetric convergence. B. Conjugate saccade. C. Saccade + Vergence. In panel C where the saccade and vergence occur together, peak vergence speed (upper traces, solid lines) is greater than in panel A and peak saccade speed (upper traces, dashed lines) is less than in panel B. From Maxwell and King, 1992.
