Dreher A W, Weinreb R N
Department of Ophthalmology, University of California, San Diego 93093-0946.
Invest Ophthalmol Vis Sci. 1991 Oct;32(11):2992-6.
The authors evaluated the accuracy of topographic measurements with the laser tomographic scanner using a model eye. Diameter, depth, and shape at different axial lengths of four sample holes that simulated optic nerve heads in phakic and aphakic conditions were determined by confocal imaging. The computer-generated cross-section profiles of the simulated optic nerve heads corresponded well with the actual contours as photographed by scanning electron microscopy. The average relative error in diameter was 2.0% (range: 0.3-2.9%) for the phakic model eye and 3.6% (range: 0.6-8.2%) for the aphakic model eye. The average relative error in depth was 11.7% (range: 1.2-20.1%) for the phakic model eye and 10.1% (range: 1.7-22.6%) for the aphakic model.
作者使用模型眼评估了激光断层扫描仪进行地形测量的准确性。通过共聚焦成像确定了在有晶状体和无晶状体状态下模拟视神经乳头的四个样本孔在不同眼轴长度下的直径、深度和形状。模拟视神经乳头的计算机生成的横截面轮廓与扫描电子显微镜拍摄的实际轮廓非常吻合。有晶状体模型眼直径的平均相对误差为2.0%（范围：0.3 - 2.9%），无晶状体模型眼为3.6%（范围：0.6 - 8.2%）。有晶状体模型眼深度的平均相对误差为11.7%（范围：1.2 - 20.1%），无晶状体模型眼为10.1%（范围：1.7 - 22.6%）。
