摘要
目的探讨合并有角膜瘢痕的外伤性白内障人工晶状体屈光度精确的计算方法，以减少术后屈光误差，恢复良好的裸眼视力。方法分析了2005年6月至2006年9月在笔者所在医院实施PHACO＋IOL植入术的合并有角膜瘢痕的外伤性白内障患者43例（43眼），收集其术前分别用常规方法获得的角膜曲率值和植入的IOL屈光度（对照组）及用Orbscan—Ⅱ所测得的角膜曲率数值代入公式SRK／T计算IOL屈光度（实验组），以及术后3个月行电脑和检影验光获得的术后屈光状态球镜值，并比较前后两种方法所得IOL屈光度的差别。结果实验组IOL屈光度误差1D以下占73．47％，1～3D占26．53％，未出现3D以上的屈光误差；与常规角膜曲率计测得的角膜曲率值代人SRK—II公式计算的IOL屈光度（对照组）相比，用Orbscab—Ⅱ所测得的角膜曲率值代人SRK—T公式计算的IOL屈光度误差在1D以上的比例减少28．47％。组间对比差异具有统计学意义（P〈0．05）。结论对合并有角膜瘢痕的外伤性白内障，应用角膜地形图仪测得的角膜曲率值及用SRK／T公式计算的IOL屈光度更接近患眼的屈光状态。
Objective To probe into the IOL Power Calculation of those patients in Traumatic cataract combined with corneal astigmatism, to decrease the relative accuracy of clinical patients after operation in refractive aspect. Methods There are 43 patients （43eyes） which were performed traumatic cataract combined with corneal astigmatism, accepted TOPCON photokeratometer, computer and retinoscopy optometry, and after three months later, acceoted OBSCANII corneal topography＇s examination, then calculated respectively the IOL Power with SRK - Ⅱ and SRK/T formula. Results Ascompared with routine photokeratometer measurement and SRK - Ⅱ , using OBSCANII corneal topography＇s examination and SRK/T formula, the residualre fraction error more than 1 dioptre after operation was reduced 28.47%. Conclusion The new method is reasonable, accurate and practable.
出处
《中国医学创新》
CAS
2009年第7期23-24,共2页
Medical Innovation of China
