方法：在行白内障超声乳化吸出联合人工晶状体植入后1mo行Nd：YAG激光后囊切开。

结果：观察组21眼经3a随访，3眼出现后囊混浊。对照组20眼，3a时12眼发生后囊混浊，与观察组比较，Z=-3.04，P=0.002，两组差异有统计学意义。

结论：Nd：YAG激光预防性后囊切开，可有效地防止青壮年白内障术后后囊混浊的发生。

METHODS:Phacoemulsification combined with intraocular lens(IOL)implantation was performed 1 months earlier than Nd:YAG laser posterior capsulotomy.

RESULTS: In the observation group of 21 eyes, there was no PCO in 18 eyes after 3 years. In the control group of 20, PCO occurred in 12 eyes after 3 years. In comparison to the control group and observation group after 3 years, Z=-3.04, P=0.002, the difference between the two groups was statistically significant.

CONCLUSION:Nd:YAG laser posterior capsulotomy can effectively prevent PCO after phacoemulsification in youth.