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目的探讨小切口白内障摘除手术中不同宽度切口对术后散光的影响。方法将术前散光≤1.5D的92例单眼白内障待术患者依其选择晶体的不同而分作A、B两组,A组植入硬晶体,作5.5mm颞侧透明角膜切口;B组植入折叠晶体,作3.2mm颞侧透明角膜切口,均行超声乳化白内障摘除。分别观察术后7d和1个月角膜散光变化及视力恢复情况。结果术后1个月A、B两组裸眼视力≥0.5者分别为79.6%、66.4%,结果比较差异有显著性(χ2=46.08,P<0.01)。A组术前平均角膜散光度为0.96±0.87D,术后1个月为0.54±0.56D,手术前后差异有显著性(U=2.267,P>0.05)。B组术前平均散光度为0.65±0.86,术后1个月为0.64±0.67D,手术前后差异没有显著性(U=1.016,P>0.05)。结论白内障术后角膜散光与手术切口宽度有相关性。
Objective To investigate the effect of different width incision on postoperative astigmatism in small incision cataract surgery. Methods A total of 92 patients with monocular cataract undergoing preoperative astigmatism ≤1.5D were divided into groups A and B according to their selected crystal types. Group A received hard corneal incision for 5.5mm temporal clear corneal incision. Group B Into the folded crystal, for 3.2mm temporal clear corneal incision, phacoemulsification cataract removal. Corneal astigmatism changes and visual acuity recovery were observed at 7 days and 1 month after operation. Results The uncorrected visual acuity ≥ 0.5 in groups A and B at 1 month after surgery was 79.6% and 66.4%, respectively. The difference was significant (χ2 = 46.08, P <0.01). The mean preoperative corneal astigmatism in group A was 0.96 ± 0.87D and 0.54 ± 0.56D at 1 month after operation. There was significant difference between before and after operation (U = 2.267, P> 0.05). The preoperative average astigmatism in group B was 0.65 ± 0.86 and 0.64 ± 0.67D at 1 month after operation. There was no significant difference before and after operation in group B (U = 1.016, P> 0.05). Conclusion There is a correlation between corneal astigmatism and surgical incision width after cataract surgery.