维生素A供给不足，可引起夜盲症已屡见报道，行车人员在晚间行车时如患有夜盲症就会增加交通事故。在交通事故比较多的今天，除了行车人员是否熟练地掌握驾驶技术之外，必须注意两种客观因素：一是车辆性能是否良好，二是行车人员的健康状况如何。文本准备就医学角度，探讨行车人员暗适应的问题。 Insufficient supply of vitamin A can cause night blindness has been reported, traffickers who night blindness will increase traffic accidents when driving at night. In today’s traffic accidents, there are two objective factors that must be paid attention to except whether the driver is proficient in driving technology: first, whether the vehicle performance is good, and secondly, how the driver’s health status is. The text is prepared to discuss the problem of dark adaptation of the driver on the medical point of view.