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Schematic of eye movement task conditions. Top left, Sinusoidal vergence tracking from 2° verged to 8° verged and back at 0.8 Hz for the duration of the block. Top right, Square-wave vergence steps from 2° verged to 8° verged and back at 0.8 Hz for the duration of the block. Bottom left, Sinusoidal smooth pursuit from −6° on the azimuth to +6° and back at 0.8 Hz for the duration of the block. Bottom right, Sequential saccades of 10 or 12° at 1.5 Hz for the duration of the block.
