Visual hallucination is a common non-motor symptom among patients with PD.
视幻觉是帕金森（PD）患者常见的一种非运动性症状。
The symptom checklist 90(SCL 90) and neurobehavior evaluation system(NES C2) were used to measure the mood state, mental arithmetic, symbol substitution and visual retention factors.
应用SCL- 90量表及神经行为测试系统（NES- C2 ）测量舰员与学员出海前后的情感状态、心算、符号译码、视觉保留等因子。
Compared with the traditional operation, the obvious symptom of VDT operation is visual fatigue caused by overuse.
与传统作业相比，VDT作业明显的症状是用眼过度引起的视觉疲劳。
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