Sanders D R, Kraff M C
J Am Intraocul Implant Soc. 1982 Fall;8(4):365-9. doi: 10.1016/s0146-2776(82)80033-5.
Axial length measurements in 200 patients were performed with the Digital Biometric Ruler (DBR) and the Echo-oculometer with (Echo-osc) and without an oscilloscope (Echo). Measurements taken with the DBR and Echo-osc correlated better with each other than either did with the Echo measurements. In 32% of cases, the DBR and Echo-osc measurements differed by 0.4 mm or more, corresponding to a difference in predicted implant power of 1 diopter (D) or more. In 8% of cases, the measurements differed by 0.8 mm or more, corresponding to a difference in predicted implant power of 2D or more. In spite of these differences in axial length measurement in individual patients, intraocular lens implant power using the SRKTM formula, could be accurately predicted to within 1D of spectacle correction in 75% to 82% of cases, and to within 2D of spectacle correction in 94% to 98% of cases using either the DBR or Echo-osc measurements. Based on the poor correlation of the Echo axial length measurements to the other two, and the poorer implant power prediction accuracy, we do not recommend the use of the Echo-oculometer without an oscilloscope.
对200名患者进行了眼轴长度测量，分别使用数字生物测量尺（DBR）、带示波器的眼轴测量仪（Echo-osc）和不带示波器的眼轴测量仪（Echo）。与Echo测量值相比，DBR测量值与Echo-osc测量值之间的相关性更好。在32%的病例中，DBR测量值与Echo-osc测量值相差0.4mm或更多，这相当于预测植入物屈光度相差1屈光度（D）或更多。在8%的病例中，测量值相差0.8mm或更多，这相当于预测植入物屈光度相差2D或更多。尽管个体患者的眼轴长度测量存在这些差异，但使用SRKTM公式，根据DBR或Echo-osc测量值，在75%至82%的病例中，人工晶状体植入物屈光度能够被准确预测在眼镜矫正度的1D范围内，在94%至98%的病例中能够被准确预测在眼镜矫正度的2D范围内。基于Echo眼轴长度测量值与其他两者的相关性较差以及植入物屈光度预测准确性较低，我们不建议使用不带示波器的眼轴测量仪。
