Abstract：
To investigate the concordance between the corneal power determined by various approaches with two tomographers (MS-39® and Galilei G6®) and the clinical history method (CHM) in patients undergoing photorefractive surgery with excimer laser for myopic errors.
Prospective cohort study. Patients undergoing keratorefractive surgery, and having pre- and postoperative keratometries, and tomographies, were included.
In 90 eyes, the differences in the power estimated by the CHM and the one determined by four approaches with the corneal tomographers, which included measurements of the posterior cornea, did not show statistically significant differences in their averages. However, the 95% limits of agreement were very wide. After obtaining regression formulas to adjust the values of these four variables, the results of the agreement analysis were similar.
Although certain values either directly determined or derived from measurements with the Galilei® and MS-39®corneal tomographers, approximated the estimated value of postoperative corneal power according to the CHM, due to the amplitude of their limits of agreement, these calculations must be taken with care, because they may not be accurate in a given eye.
Prospective cohort study. Patients undergoing keratorefractive surgery, and having pre- and postoperative keratometries, and tomographies, were included.
In 90 eyes, the differences in the power estimated by the CHM and the one determined by four approaches with the corneal tomographers, which included measurements of the posterior cornea, did not show statistically significant differences in their averages. However, the 95% limits of agreement were very wide. After obtaining regression formulas to adjust the values of these four variables, the results of the agreement analysis were similar.
Although certain values either directly determined or derived from measurements with the Galilei® and MS-39®corneal tomographers, approximated the estimated value of postoperative corneal power according to the CHM, due to the amplitude of their limits of agreement, these calculations must be taken with care, because they may not be accurate in a given eye.
摘要：
研究使用两种断层扫描仪（MS-39®和GalileiG6®）通过各种方法确定的角膜屈光力与临床病史方法（CHM）之间的一致性。
前瞻性队列研究。接受角膜屈光手术的患者，并进行了术前和术后的角膜解剖，和断层摄影，包括在内。
在90眼，CHM估计的功率差异和角膜断层扫描仪通过四种方法确定的功率差异，其中包括后角膜的测量，他们的平均值没有显示出统计学上的显著差异。然而,95%的协议限制非常广泛。在获得回归公式以调整这四个变量的值之后，协议分析的结果相似。
虽然某些值是直接测定的，或是由Galilei®和MS-39®角膜断层扫描仪测量得出的，根据CHM近似术后角膜屈光力的估计值，由于它们的协议限制的幅度，这些计算必须小心，因为它们在给定的眼睛中可能不准确。
前瞻性队列研究。接受角膜屈光手术的患者，并进行了术前和术后的角膜解剖，和断层摄影，包括在内。
在90眼，CHM估计的功率差异和角膜断层扫描仪通过四种方法确定的功率差异，其中包括后角膜的测量，他们的平均值没有显示出统计学上的显著差异。然而,95%的协议限制非常广泛。在获得回归公式以调整这四个变量的值之后，协议分析的结果相似。
虽然某些值是直接测定的，或是由Galilei®和MS-39®角膜断层扫描仪测量得出的，根据CHM近似术后角膜屈光力的估计值，由于它们的协议限制的幅度，这些计算必须小心，因为它们在给定的眼睛中可能不准确。
