Saccade

saccade \sa-ˈkäd\ noun: a small, rapid, jerky, voluntary movement of the eye, especially as it jumps from fixation on one point to another (as in reading)

Etymology: French, twitch, jerk, from Middle French, from saquer to pull, draw

Microsaccades resemble involuntary, miniature saccades. “Their implementation in the oculomotor system is unknown,” according to M. Rolfs, R. Kliegl & R. Engbert in “Toward a model of microsaccade generation: The case of microsaccadic inhibition,” published in Journal of Vision (2008).