Olsen T, Thim K, Corydon L
Department of Ophthalmology, Vejle Sygehus, Denmark.
J Cataract Refract Surg. 1990 Mar;16(2):217-25. doi: 10.1016/s0886-3350(13)80734-1.
The predictability of a theoretical, computerized (PC-assisted) intraocular lens (IOL) power calculation method and of the Sanders-Retzlaff-Kraff [SRK] I and II methods was evaluated from preoperative and postoperative biometry in 202 cataractous patients who had extracapsular cataract extraction (ECCE). The theoretical method resulted in the lowest range and standard deviation of the error, and the highest correlation coefficient between the observed and the predicted refraction (P less than .05). The superiority of the theoretical approach was most clearly demonstrated when the postoperative measurements were used in the predictions (P less than .001). This demonstrated the potential accuracy of the formula used and the importance of incorporating methods to predict the IOL position after surgery. If the prediction of the IOL chamber depth was properly corrected for the axial length dependence, a high prediction accuracy could be obtained in short as well as in long eyes.
通过对202例接受白内障囊外摘除术（ECCE）的白内障患者术前和术后的生物测量，评估了一种理论上的计算机化（PC辅助）人工晶状体（IOL）屈光度计算方法以及Sanders-Retzlaff-Kraff [SRK] I和II方法的可预测性。理论方法产生的误差范围和标准差最低，观察到的和预测的屈光度之间的相关系数最高（P <.05）。当在预测中使用术后测量值时，理论方法的优越性最为明显（P <.001）。这证明了所使用公式的潜在准确性以及纳入预测术后IOL位置方法的重要性。如果针对眼轴长度依赖性对IOL房深度的预测进行适当校正，那么在短眼和长眼中都可以获得较高的预测准确性。
