Pain and fatigue of the eyes,often accompanied by headache,resulting from prolonged use of the eyes,uncorrected defects of vision,or an imbalance of the eye muscles.

• 眼下疲劳，眼睛的疼痛和疲乏，常伴有头痛，长久使用眼睛所致，或因未矫正的视力缺陷或眼肌的不平衡。