Methods The H 2S concentrations in the working condition that induced 9 cases and 12 times of ocular injury were inspected and the ocular symptoms and signs were observed .

方法对9例12次接触H2S而出现 眼化学伤的污水处理 工人 工作环境中H2S浓度进行监测，观察H2S损伤的眼部症状和体征。