Coburn R M, Grandon S C, Grandon G M
Academic Computer Center, University of North Carolina, Greensboro 27412-5001.
J Cataract Refract Surg. 1990 Jul;16(4):457-64. doi: 10.1016/s0886-3350(13)80799-7.
Many second generation intraocular lens power calculation formulas have recently been introduced. This study explores the performance of these formulas while controlling for a potential source of variation--the lens type. For this study, all 1,157 cases studied used the Cilco CPLU posterior chamber lens. All surgeries were performed using similar phacoemulsification techniques by only two physicians (R.M.C. and S.C.G.). The SRK, SRK II, Holladay, and Binkhorst formulas were compared among themselves and also with a piece-wise nonlinear regression formula ("best fit") developed specifically from these data by the authors. Performance of the SRK II, Holladay, and best fit were better than the older SRK and Binkhorst for most axial length ranges. For these data, the Holladay and best fit formulas performed marginally better overall than the other formulas. It was also found that manipulation of specific surgeon constants significantly affected the performance of the Binkhorst formula, but had little effect on the other formulas.
最近引入了许多第二代人工晶状体屈光度计算公式。本研究在控制一个潜在变异源——晶状体类型的同时，探讨了这些公式的性能。在本研究中，所研究的1157例病例均使用了Cilco CPLU后房型人工晶状体。所有手术均由仅两名医生（R.M.C.和S.C.G.）采用类似的超声乳化技术进行。对SRK、SRK II、霍拉迪（Holladay）和宾克霍斯特（Binkhorst）公式进行了相互比较，还与作者根据这些数据专门开发的分段非线性回归公式（“最佳拟合”）进行了比较。在大多数眼轴长度范围内，SRK II、霍拉迪和最佳拟合公式的性能优于较旧的SRK和宾克霍斯特公式。对于这些数据，霍拉迪和最佳拟合公式的总体表现略优于其他公式。还发现，特定手术医生常数的调整对宾克霍斯特公式的性能有显著影响，但对其他公式影响不大。
