An 85-year-old Japanese woman with acute primary angle closure in her right eye underwent cataract extraction. Because of the weakness of the Zinn’s zonules, all of the lens tissue including the lens capsule was removed by phacoemulsification. Because of the absence of vitreous prolapse into the anterior chamber, vitrectomy was not performed. Nine days postoperatively, acute angle closure due to pupillary block by an anterior vitreous membrane developed. To resolve the pupillary block, anterior vitrectomy was performed on the same day. Postoperatively, her symptoms resolved, the anterior chamber deepened, and the intraocular pressure normalized. Although rare, acute angle closure due to pupillary block by an anterior vitreous membrane can occur after total lens extraction with phacoemulsification. If no vitreous prolapse occurs with total lens extraction, an intentional hyaloidotomy using an anterior vitreous cutter or iridectomy should be considered to avoid secondary angle closure.
Case Rep Ophthalmol 2021;12:882–888

中文翻译：

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超声乳化全晶状体摘除后完整前玻璃体膜引起的无晶状体瞳孔阻滞

一位 85 岁的日本女性右眼原发角闭合严重，接受了白内障摘除术。由于 Zinn 小带的弱点，包括晶状体囊在内的所有晶状体组织都通过超声乳化术去除。由于没有玻璃体脱垂进入前房，没有进行玻璃体切除术。术后 9 天，由于前玻璃体膜引起的瞳孔阻滞导致急性房角关闭。为了解决瞳孔阻滞，在同一天进行了前路玻璃体切除术。术后，她的症状消失，前房加深，眼压恢复正常。虽然罕见，但在超声乳化全晶状体摘除后，可能会发生由于前玻璃体膜阻滞瞳孔引起的急性房角关闭。
Case Rep Ophthalmol 2021；12:882–888