外伤性白内障手术人工晶状体屈光度测算方法的改进——应用Orbscan-Ⅱ测算外伤性白内障晶状体屈光度  

The improvement of IOL diopter calculation with Orbscan-Ⅱ in traumatic cataract

作　　者：温成林[1] 贾俊红[1] 郑广瑛[2] 

机构地区：[1]三门峡市中心医院眼科,河南三门峡472000 [2]郑州大学第一附属医院眼科,河南郑州450052

出　　处：《眼外伤职业眼病杂志》2009年第8期574-577,共4页Journal of Injuries and Occupational Diseases of the Eye with Ophthalmic Surgeries

摘　　要：目的改进眼外伤合并角膜瘢痕的白内障手术前常规测量所需人工晶状体(IOL)屈光度的方法,减少术后的屈光误差。方法我院小切口白内障囊外摘出和IOL植入术合并有角膜瘢痕的外伤性白内障86例(86眼)。随机分为2组,分别收集其术前用常规方法获得的角膜曲率值和植入的IOL屈光度(对照组)和以Orbscan-Ⅱ所测得的角膜曲率数值代入公式SRK/Ⅱ计算IOL屈光度(试验组),以及术后3个月的屈光状态球镜值,并比较两组方法所得IOL屈光度的差别。结果经小样本成组设计资料两样本均值比较的t检验,两种检测角膜曲率的方法差异有统计学意义(P<0.05)。试验组IOL屈光度误差1.00D以下占69.77%,1.00～3.00D占30.23%,未出现3.00D以上的屈光误差。与对照组相比,试验组的IOL屈光度误差在1.00D以上的比例减少25.58%。结论对合并有角膜瘢痕的外伤性白内障,应用Orbscan-Ⅱ角膜地形图仪测得的角膜曲率值及用SRK-Ⅱ公式计算的IOL屈光度更接近患眼的真实屈光状态。Objective To improve the precise method of IOL dioptre calculation in traumatic cataract combined with corneal cicatrices. Methods 86 patients （86 eyes） of traumatic cataract combined with corneal cicatrices were performed small-incision manual ECCE and IOL implantation. The patients were randomly divided into two group. Routine keratometer was used in control group and Orbscan-Ⅱ corneal topograph examination was used in experiment group. The corneal curvature, IOL diopter, and refractive condition were observed three months after operation. Results Compared with routine photokeratometer and SRK-Ⅱ formula, using Orbscan- Ⅱ corneal topography＇ s examination and SRK- Ⅱ formula, the residual refraction error more than 1 dioptre after operation reduced 25.58%, the difference was satistically significant （ P 〈 0.05 ）. Conclusion The method with Orbscan-Ⅱ corneal topography＇ s examination and SRK-Ⅱ formula to calculate IOL dioptre is accurate for traumatic cataract with corneal scar.

关 键 词：眼外伤 白内障 角膜曲率 Orbscan-Ⅱ晶状体 人工 

分 类 号：R779.66[医药卫生—眼科] R779.12[医药卫生—临床医学]