玻璃体脱出是白内障摘出最严重的并发症之一。采用显微手术得以把玻璃体脱出从15%～16%降到2%～6%。预防玻璃体脱出,术前降低眼压是重要的。作者以β-肾上腺素能阻滞剂(0.5%噻吗心安药水)在手术头天晚上和早上术前2小时点眼,作为白内障术前常规。β-肾上腺素能阻滞剂的作用同减少房水形成有 Vitreous prolapse is one of the most serious complications of cataract extraction. Using microsurgery to vitreous prolapse from 15% to 16% down to 2% to 6%. Prevention of vitreous prolapse before surgery to reduce intraocular pressure is important. The authors prescribe beta-adrenergic blockers (0.5% timolol in water) on the first night of surgery and 2 hours before surgery, preoperatively as a preoperative cataract. β-adrenergic blockers with the role of reducing the formation of aqueous humor