硅油填充状态下测算人工晶状体屈光度数准确性分析

目的 探讨一种利用数学矫正公式来准确测算硅油填充状态下人工晶状体屈光度数的方法 .方法 选取2005年1月至2006年10月在我院施行硅油取出联合白内障超声乳化吸出及人工晶状体植入术的患者共25例25眼,分成A、B 2组.A组13眼, 为对照组,采用玻璃体切割硅油填充术前提前测定的晶状体度数作为参考值;B组12眼,为公式组,采用矫正公式来进行计算.A、B 2组术前预期术后屈光度均为-1.5 D.分析A、B 2组术后屈光度分布情况,并和预期值之间进行比较.结果 对照组和公式组术后屈光度与预期值(-1.5 D)差值之间进行比较,P=0.035＜0.05,差异均有统计学意义.从差值的均数来看,公式组要优于对照组.结论 硅油填充眼预设晶状体度数时,数学矫正公式不失为一种准确、有效的办法,值得推广,但有一定的适用范围.

Analysis of precision in predicting intraocular lens refraction in silicon oil tamponade

Objective To analyze a method in the aspect of predicting the intra ocular lens(IOL) diopter in silicone oil-filled eyes through a mathematical correcting formula.Methods Twenty-five cases(25 eyes),who underwent combined surgery of silicon oil removal,cataract phacoemulsification and IOL implantation,were divided into two groups from January,2005 to October,2006.A group as control group adopted the results measured before the time being filled with silicone oil.B groups,formula group,adopted a mathematical correcting formula to calculate the IOL power.The predicted diopter of both two groups was -1.5 D.Refractive states after operation and deviation from predicted refraction were compared between two groups.Results There had significant difference between control group and formula group in comparison between diopter after operation and predicted refraction(P=0.035<0.05).Formula group prior to control group.Conclusion The mathematical correcting formula in predicting IOL power is a precise and effective method and can be wildly used in some certain conditions.