人工晶体眼A常数的计算和修正

Calculation and Correction of the Constant A of Pseudophakia

目的：探讨适合国内患者的人工晶体屈光度计算的Ａ常数值。方法：统计分析了３５５只后房型人工晶体眼的生理参数，并用二元线性回归对３５５只后房型人工晶体眼进行Ａ常数计算。结果：康明、Ｓｔｏｒｚ和Ｐｈａｒｍａｃｉａ人工晶体的Ａ常数分别为１１６．９、１１７．６和１１７．８，回归标准分别为２．４４、１．８３和２．９８。结论：利用国内患者的临床资料进行二元线性回归而得的Ａ常数值可指导临床医师更准确地计算人工晶体屈光度值。

Objective: To probe into the constant A which is suitable for the calculation and correction of it among internal patients with pseudophakia. Methods: Statistical analysis of physiological parameters obtained from 355 patients with pseudophakia was made and the constant A among 355 patients with pseudophakia was calculated with dual linear regression. Results: The constants A of KM,Storz and Pharmacia were 116.9,117.6 and 117.8 respectively while standard deviation was 2.44,1.83 and 2.98 respectively. Conclusion: The constant A obtained by exploiting clinic data gathered from internal patients can be helpful to those clinic doctors in calculating the diopter of IOL more accurately.