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目的 探讨小切口超声乳化白内障吸除联合后房型人工晶状体植入手术后角膜散光情况及手术性散光度的变化。方法 对 38例 (38只眼 )白内障患者行上方巩膜倒眉状小切口超声乳化白内障吸除联合人工晶状体植入手术。分别于术前 ,术后 1d、1个月及 3个月使用角膜地形图仪及自动屈光仪进行角膜散光情况检测。结果 平均角膜散光度术后 1d、1个月及 3个月分别为 (1 10± 0 71)、(1 0 8± 0 6 6 )及 (0 87± 0 5 5 )D ;术后 3个月与术前比较差异无显著性 (P >0 0 5 )。平均手术性散光度术后 1d、1个月及 3个月分别为 (1 37± 1 0 3)、(1 2 4± 0 93)及 (1 0 4± 0 75 )D ;术后 3个月与术后 1d比较差异有显著性 (P <0 0 5 )。结论 上方巩膜倒眉状无缝线小切口对术后角膜散光影响小 ;将手术性散光的度数及轴位变化进行矢量分析 ,可综合评价手术致角膜屈光状态的改变 ;角膜地形图可准确反映角膜曲率变化 ,对评价白内障手术后角膜散光变化具有重要的临床意义。
Objective To investigate the changes of corneal astigmatism and surgical astigmatism after phacoemulsification combined with posterior chamber intraocular lens implantation. Methods Thirty - eight eyes (38 eyes) of cataract patients underwent upper scleral incision and small incision phacoemulsification combined with intraocular lens implantation. Corneal astigmatism was detected with corneal topography and autorefractometry at preoperative, postoperative 1 day, 1 month and 3 months respectively. Results The average corneal astigmatism was (1 10 ± 0 71), (1 0 8 ± 0 6 6) and (0 87 ± 0 5 5) D at 1 day, 1 month and 3 months after operation, There was no significant difference between month and preoperative (P> 0.05). The average operative astigmatism was (1 37 ± 1 0 3), (1 2 4 ± 0 93) and (1 0 4 ± 0 75) D respectively at 1 day, 1 month and 3 months after operation. After operation, 3 There was a significant difference between month and postoperative 1d (P <0.05). Conclusions The small scleral incision sutureless small incision has little effect on postoperative corneal astigmatism. Vector analysis of the degree of surgical astigmatism and axial changes can be used to evaluate the change of corneal refractive status. The corneal topography can be accurately It can reflect the change of corneal curvature and has important clinical significance for the evaluation of corneal astigmatism after cataract surgery.