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本文报道两例局部球后注射麻醉剂引起对侧眼发生黑朦。1例是64岁的妇女，1例是57岁的男性。黑朦是由于麻醉剂通过视交叉进入蛛网膜下腔到达对侧视神经所致，两例患者的视力在90分钟内都恢复到了术前水平．目前球后注射的眼球位置由以往的向内上转改为向前看或轻度外下转，这样就避免了注射针头意外刺入视神经鞘，而使药物进入蛛网膜下腹内，引起一系列的并发症。
This article reports two cases of local retrobulbar anesthesia caused contralateral eye darkness. One was a 64-year-old woman and one was a 57-year-old man. Darkness is due to the anesthetic through the optic chiasm into the subarachnoid space to reach the contralateral optic nerve caused by two cases of patients with visual acuity within 90 minutes have returned to the preoperative level. At present, the ball after the injection of the ball position from the previous inward turn to look forward or mild outside the next turn, thus avoiding the accidental needle into the optic nerve sheath, leaving the drug into the abdominal subarachnoid, causing a series Complications.