Weinreb R N, Dreher A W, Bille J F
Department of Ophthalmology, University of California, San Diego.
Int Ophthalmol. 1989 Jan;13(1-2):25-9. doi: 10.1007/BF02028633.
We describe the use of a laser tomographic scanner to objectively measure optic nerve head topography. A laser beam is focused on the optic disc using confocal imaging. Reflected light is detected only if it originates from a small region around the focal place of the special optics. Optic disc parameters are calculated from the measured values of confocal reflected light. In five glaucomatous eyes, maximum cup depth was between 0.33 mm and 0.58 mm. Cup volume was between 0.10 mm3 and 0.65 mm3; it correlated well with ophthalmoscopy. Compared with conventional imaging systems, the laser tomographic scanner has certain advantages: 1) images can be obtained with miotic pupils; 2) clarity of media is not important; 3) low light intensity is employed; and 4) a real time image is obtained.
我们描述了使用激光断层扫描仪客观测量视神经乳头形态的方法。利用共焦成像将激光束聚焦在视盘上。只有当反射光来自特殊光学系统焦点周围的小区域时才会被检测到。视盘参数由共焦反射光的测量值计算得出。在五只青光眼眼中，最大杯深在0.33毫米至0.58毫米之间。杯体积在0.10立方毫米至0.65立方毫米之间；与检眼镜检查结果相关性良好。与传统成像系统相比，激光断层扫描仪具有某些优势：1）可在瞳孔缩小的情况下获取图像；2）介质清晰度不重要；3）使用低光强度；4）可获得实时图像。
