锰是维持生命所必要的微量元素，如锰在体内过多容积即会造成中毒，令将所见一例慢性锰中毒所致视神经萎缩报告如下。翁某，男，27岁，住院号105916o主诉双眼视力明显下降已3个月，于1992年2月10日入院。发病前曾在某市从事锰矿开发工作有二年余。近4个月每日工作达8小时以上， Manganese is a trace element necessary to maintain life, such as excessive volume of manganese in the body that will cause poisoning, so see a chronic manganese poisoning caused by optic nerve atrophy reported as follows. Wengmou, male, 27 years old, hospital number 105916o chief complaint binocular vision was significantly decreased by 3 months, February 10, 1992 admission. Before the onset of a city engaged in manganese ore development work more than two years. Nearly 4 months daily work for more than 8 hours,