Autokinetic drifts and gaze deviation.
D000360:Afterimage; D005133:Eye Movements; D005260:Female; D005403:Fixation, Ocular; D006801:Humans; D007088:Illusions / Q000502:physiology*; D008297:Male; D009474:Neurons / Q000502:physiology; D012160:Retina / Q000502:physiology