方法：选择双眼超高度近视拟行白内障患者14例，双眼先后均行Phaco+IOL植入术，随机选择一眼作为5mm撕囊口直径观察组，对侧眼作为6mm撕囊口直径观察组，娴熟手术医师完成白内障摘除联合囊袋内人工晶状体植入同型亲水丙烯酸非球面人工晶状体(MCX11)，手术经过均顺利，所有入组患者术后次日经Image-pro plus6.0图像分析软件测量确认主要子午线囊口直径与目标撕囊直径不超过±0.2mm。术后1wk； 1，3，6mo行散瞳后囊口形态、人工晶状体位置形态观察，屈光状态检查，前房深度测量，观察囊袋内人工晶状体的稳定性。

结果：与术后1wk相比，两组术后1mo前囊口直径轻度缩小，两组间无显著差异。5mm组在1～3mo随访期内有轻度远视漂移，6mm组在术后1mo内有轻度远视漂移，1mo后则趋于稳定。屈光变化与前房深度变化同步。5mm组3mo随访期有3眼发生襻缘轻度变形。

结论：超高度近视患者采用较小的撕囊口可能引起囊袋-IOL复合体的不均匀收缩或前后移位。术后1mo屈光状态的进行性变化可早期提示人工晶状体稳定性的变化，及时进行干预可减少远期并发症的发生。

METHODS: A total of fourteen cataract patients with bilateral super high myopia were included,Phaco+IOL implantation were performed on both eyes, one eye was randomly classified into 5mm diameter CCC observation group, the fellow eye was 6mm diameter CCC observation group. Cataract extraction combined with in-the-bag intraocular lens implantation(IOL)with the type of hydrophilic acrylic aspheric intraocular lens(MCX11)by well experienced surgeon. The operation was running smoothly, the next day after operation, all patients were confirmed by Image-pro plus6.0 image analysis software for the measurement of main meridian sac diameter with target capsulorhexis diameter no more than ±0.2mm. Slit lamp examination of IOL shape and position, changes of anterior capculorhexis edge, refraction, anterior chamber depth was measured and observed of all eyes after operation 1wk; 1, 3, 6mo.

RESULTS: Compared with postoperation 1wk, the former sac diameter of two groups were slightly smaller at postoperation 1mo, with no statistically significant difference between two groups. 5mm diameter CCC observation group had slightly hyperopic shift in follow-up 1-3mo, 6mm diameter CCC observation group had hyperopic shift in follow-up 1mo, and getting stable after 1mo. Refraction change was related to anterior chamber depth changes. 5mm diameter CCC observation group had 3 minor loop folding in follw-up 3mo.

CONCLUSION: Relatively smaller continuous curvilinear capsulorhexis in super high myopic eyes underwent cataract surgery may cause a tendency of uneven construction or effective lens position change of in-the-bag IOL. Unusual refraction change or shift after operation 1mo could suggest instability of IOL, early noticing or interruption could prevent further complications.