Olsen T, Thim K, Corydon L
Department of Ophthalmology, Vejle Sygehus, Denmark.
J Cataract Refract Surg. 1991 Mar;17(2):187-93. doi: 10.1016/s0886-3350(13)80249-0.
The accuracy of two newer generation theoretical intraocular lens (IOL) power calculation formulas and of the empirical SRK I and II formulas was evaluated in a series of 500 IOL implantations including a series of unusually long and short eyes. The prediction error of the theoretical formulas was found to be largely unaffected by the variation in axial length and corneal power, while the prediction of the SRK I formula was less accurate in the short and long eyes. The prediction of the SRK II formula was more accurate than the SRK I in that no systematic offset error with axial length could be demonstrated. However, because of a relatively larger scatter in the long eyes and a significant bias with the corneal power, the absolute error of the SRK II formula was higher than that of the theoretical formulas in the long eyes. The higher accuracy of the newer generation theoretical formulas was attributed to their improved prediction of the pseudophakic anterior chamber depth.
在包括一系列眼轴异常长和短的眼睛在内的500例人工晶状体（IOL）植入手术中，对两种新一代理论IOL屈光度计算公式以及经验性SRK I和II公式的准确性进行了评估。发现理论公式的预测误差在很大程度上不受眼轴长度和角膜屈光力变化的影响，而SRK I公式在短眼和长眼中的预测准确性较低。SRK II公式的预测比SRK I更准确，因为未发现与眼轴长度存在系统性偏移误差。然而，由于长眼中相对较大的离散度以及与角膜屈光力存在显著偏差，SRK II公式在长眼中的绝对误差高于理论公式。新一代理论公式更高的准确性归因于它们对人工晶状体眼前房深度的预测得到了改善。
