Surgical peripheral iridectomies occluded by vitreous, exudation or omission of peripheral iridectomy during cataract operation were the most common causes.

• 周边虹彩切除处被玻璃体、渗出物覆盖或手术时没有做周边虹彩切除术是发生瞳孔阻塞最常见的原因。