白内障术后晶状体前囊膜收缩对人工晶状体偏心的影响

目的：评价白内障术后晶状体前囊膜收缩对人工晶状体偏心的影响。

方法：选取40例40眼年龄相关性白内障患者行白内障超声乳化吸除联合人工晶状体植入术，术后使用Photoshop软件测量术后3mo内的晶状体前囊膜口面积，使用iTrace视觉质量分析仪测量人工晶状体偏心距离，采用Pearson相关性分析晶状体前囊膜收缩对人工晶状体偏心的影响。

结果：术后1d，1、3mo，前囊膜口面积逐渐缩小(P<0.01)； IOL偏心逐渐增大(P<0.01)； 患者的裸眼视力逐渐下降(P<0.01)。前囊膜口面积变化量与IOL偏心量呈正相关(r=0.566，P<0.05)，术后患者的裸眼视力与IOL偏心量无明显相关(r=-0.104，P>0.05)，前囊膜口面积变化量与初始面积呈负相关(r=-0.476，P<0.05)。

结论：白内障术后晶状体前囊膜的收缩可导致IOL偏心。

Effect of anterior lens capsule contraction on intraocular lens decentration after cataract surgery

AIM: To evaluate the influence of lens capsule contraction on intraocular lens(IOL)decentration after cataract surgery.

METHODS: Totally 40 cases(40 eyes)of senile cataract underwent phacoemulsification combined with IOL implantation. Within 3mo after operation, the anterior capsule opening area was measured by Photoshop software, the IOL decentration was measured by iTrace visual quality analyzer. The influence of anterior capsule opening area on IOL decentration was assessed by Pearson correlation analysis.

RESULTS: At 1d, 1mo and 3mo after operation, anterior capsule opening area was gradually reduced, the difference between different time points was statistically significant(P<0.01); IOL decentration gradually increased, and the difference between different time points was statistically significant(P<0.01); the visual acuity of patients decreased gradually, and the difference between different time points was statistically significant(P<0.01). The change of anterior capsule opening area was positively correlated with IOL decentration(r=0.566, P<0.05), but there was no significant correlation between visual acuity and IOL decentration(r= -0.104, P> 0.05), the change of anterior capsule opening area was negatively correlated with the initial anterior capsule opening area(r= -0.476, P<0.05).

CONCLUSION: The anterior capsule contraction after cataract surgery can lead to IOL decentration.