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. Author manuscript; available in PMC: 2012 Aug 24.
Published in final edited form as: Vision Res. 2008 Nov 26;49(2):228–236. doi: 10.1016/j.visres.2008.10.015

Figure 6.

Figure 6

The directional distributions of microsaccades detected after surround onset. Polar plots of microsaccade direction probability density were computed from 30 equally spaced directional bins for three conditions (“invisible”, “visible” and “physical disappearance”). The distance from the center of the plot represents the proportion of the microsaccade contained in a 12° bin. Direction is defined by the angle between the microsaccade vector and the x-axis of the screen coordinates (0° in the polar coordinates). The distribution in the “invisible” condition shows a smaller proportion of downward microsaccades (60.5%) than that in the “visible” condition (76.4%). About 2/3 of the microsaccades in the “physical disappearance” condition were downward (66.6%).