Raasch T
Am J Optom Physiol Opt. 1985 Jan;62(1):19-24.
The magnification of the fundus image with various forms of funduscopy in ametropia and aphakia is poorly understood. This paper investigates these relationships. Direct and indirect ophthalmoscopy and biomicroscopic funduscopy is included. The Gullstrand Simplified Schematic Eye is modified by changing either the axial length, the power of the cornea, or the index of refraction of the lens to produce ametropia. Aphakia is produced by considering these same eyes with the crystalline lens removed. The magnification of these various eye/funduscope systems is presented, along with general principles illustrated by the figures.
对于屈光不正和无晶状体眼中各种形式眼底镜检查下眼底图像的放大倍数，人们了解甚少。本文对这些关系进行了研究。研究内容包括直接和间接检眼镜检查以及生物显微镜眼底检查。通过改变眼轴长度、角膜屈光力或晶状体折射率来修改Gullstrand简化模型眼，以产生屈光不正。通过摘除这些相同眼睛的晶状体来模拟无晶状体眼。文中给出了这些不同眼/眼底镜系统的放大倍数，并通过图表说明了一般原理。
