A) Switch between saccade and smooth movement as a function of bar width. Blue circles: median; error bars: 25th–75th percentile. Orange error bars: mean ± STD. n = 40 animals, 1380 trials, 32,802 saccades. Speed = ±75 ° s−1. B) Saccade amplitude, duration and peak angular velocity is not influenced by bar width. C) Similarly, the pre-saccade integrated error varies little as the bar width increases. Bar velocity = ±75°s−1. n = 10 animals, 2,575 bar-fixation saccades. D) Saccade amplitude across the full range of bar width tested. Bar velocity = ±75°s−1. n = 10 animals, 10,067 saccades. See also Figure S4.