Autokinetic phenomenon means self (auto) motion (kinetic). The autokinetic phenomenon involves the perception of isolated stimuli, and so interpretations in terms of some internal eye movement signals remain sustainable.
It refers to the apparent movement of a stationary point of light in the dark. Perhaps you have experienced this when thinking you have spotted a moving satellite in the sky, only to realize later that it was merely an isolated star.
Other /More definition:
Autokinetic phenomenon refers to the perception by a person in a dark room that a single, stationary spot of light appears to move.