方法：回顾分析我院2007-08/2010-12白内障手术患者术中发生后囊破裂并Ⅰ期人工晶状体睫状沟植入25例25眼，根据眼轴长度(A-Scan length，AL)分为<22mm，22～25mm和>25mm三组，分别比较术后3mo的实际屈光值与术前预测囊袋内植入人工晶状体后屈光度数的差别。

结果：所有患者术后视力较术前均有不同程度改善，术后3mo视力平均0.49±0.21，术前预测囊袋内植入人工晶状体后屈光值分别为 -0.43±0.34D(AL<22mm)，-0.36±0.22D(AL：22～25mm)和-1.16±0.80D(AL>25mm)； 术后3mo三组患者眼实际屈光度数分别为-1.25±0.98D(AL<22mm)，-1.22±0.82D(AL：22～25mm)和-2.4±1.39D(AL>25mm)，各组间预测与实际屈光值比较，AL=22～25mm组差异有统计学意义(P=0.001)，术后实际屈光值较预测偏近视0.8D，其余两组差异无统计学意义(P=0.148，0.061)。

结论：为纠正人工晶状体睫状沟植入术后近视漂移，人工晶状体度数应根据AL做相应的调整。建议AL=22～25mm睫状沟植入人工晶状体度数应比预测囊袋内植入晶状体度数减0.8D。

METHODS: Totally 25 patients(25 eyes)who underwent cataract surgery and IOL sulcus implantation due to posterior capsule rupture from August 2007 to December 2010 were reviewed. All patients were divided into three groups according to A-Scan length(AL): <22mm, 22-25mm and >25mm, and the differences between the actual spherical equivalent(SE)refraction in three months postoperation and that predicted by biometry using the SRK-Ⅱ and SRK-T formula were compared.

RESULTS: The mean visual acuity was improved after cataract surgery. The mean visual acuity was 0.49±0.21 in three months postoperation. The predicted SE refraction of IOL in the bag were -0.43±0.34D(AL<22mm), -0.36±0.22D(AL 22-25mm)and -1.16±0.80D(AL>25mm)respectively. The actual SE refraction was -1.25±0.98D(AL<22mm), -1.22±0.82D(AL 22-25mm)and -2.4±1.39D(AL>25mm). There was significant difference(P=0.001)between the predicted and actual SE refraction in the group of AL 22-25mm, and the myopic shift between the predicted and postoperative refraction was 0.8D. There were no significantly differences between another two groups(P=0.148,0.061).

CONCLUSION: In order to correct a myopic shift in the case ofsulcus implantation, the IOL power should be adjusted according to the AL. For patients with AL from 22mm to 25mm, the IOL power should be reduced by 0.8D.