The conventional optokinetic nystagmus ( okn ) is elicited by a large - field moving pattern . the study of okn could contribute to the mechanism of oculomotor control and to the ophthalmological diagnosis 大范围运动图形能诱发传统的视动震颤( optokineticnystagmus ， okn )眼动，它对于眼运动( oculomotor )控制研究及临床有关疾病诊断有重要意义。
