Shields M B, Tiedeman J S, Miller K N, Hickingbotham D, Ollie A R
Duke University Eye Center, Durham, North Carolina 27710.
Am J Ophthalmol. 1989 Mar 15;107(3):273-9. doi: 10.1016/0002-9394(89)90312-7.
We used a plastic model of the human eye to study the accuracy with which the Optic Nerve Head Analyzer estimates the surface contour and two-dimensional size of the optic nerve head. Computer-generated contour lines were similar to the actual cross-sectional contour of plastic cups as photographed by scanning electron microscopy. The magnification error of computer-measured cup diameters was inversely related to the axial length of the model. The slope of this relationship was reduced with the use of either refraction or axial length as a correction factor for magnification error. Of the two correction factors, the former provided the closest estimation of the known diameters in the phakic model, while the latter performed better in the aphakic model.
我们使用人眼的塑料模型来研究视神经乳头分析仪对视神经乳头表面轮廓和二维尺寸的估计准确性。计算机生成的轮廓线与通过扫描电子显微镜拍摄的塑料杯实际横截面轮廓相似。计算机测量的杯径放大误差与模型的眼轴长度成反比。使用屈光或眼轴长度作为放大误差的校正因子，这种关系的斜率会降低。在这两个校正因子中，前者在有晶状体模型中对已知直径的估计最接近，而后者在无晶状体模型中表现更好。
