Olsen T
J Cataract Refract Surg. 1986 Jul;12(4):376-9. doi: 10.1016/s0886-3350(86)80099-2.
A formula is presented for calculating the postoperative position of an anterior chamber intraocular lens (IOL) from preoperative data on chamber depth, lens thickness, corneal curvature and diameter. The formula was arrived at by regression analysis of preoperative and postoperative data on 80 patients receiving an anterior chamber lens after intracapsular cataract extraction. The significant predictors, in order of importance, were the height of the cornea, regarded as a section of a sphere (P less than 0.001), the preoperative chamber depth (P less than 0.01), and the preoperative lens thickness (P less than 0.05). The axial length did not show a significant correlation with postoperative chamber depth (P greater than 0.05). Using the regression formula, the postoperative chamber depth could be predicted a posteriori with an accuracy of +/- 0.22 mm (SD) and a correlation coefficient of 0.58. The method described may be applied to other types of IOLs and may increase the accuracy of IOL power calculations.
本文提出了一个公式，可根据术前前房深度、晶状体厚度、角膜曲率和直径的数据来计算前房型人工晶状体（IOL）的术后位置。该公式是通过对80例囊内白内障摘除术后植入前房型晶状体患者的术前和术后数据进行回归分析得出的。按重要性排序，显著的预测因素依次为：被视为球体一部分的角膜高度（P<0.001）、术前前房深度（P<0.01）和术前晶状体厚度（P<0.05）。眼轴长度与术后前房深度未显示出显著相关性（P>0.05）。使用该回归公式，术后前房深度可事后预测，其准确性为±0.22mm（标准差），相关系数为0.58。所描述的方法可应用于其他类型的人工晶状体，并可能提高人工晶状体屈光度计算的准确性。
