UBER DIE LICHTABSORPTION AM AUGENHINTERGRUND

Abstract

Microspectrophotometric transmission studies of flat preparations of the pigmentary epithelium of chinchilla rabbits, Macaca iris monkeys and humans yielded the following findings. Transmission in the human pigmentary epithelium differs slightly from that in the chinchilla rabbit and the Macaca iris monkey. This may be determined by different size, position or orientation of the pigment granules. In the above mentioned three species, the transmission decreases from the center towards the periphery; this phenomenon is slightest in the chinchilla rabbit and most pronounced in the Macaca. The fluctuations of the transmission are of the same order of magnitude in all species and regions examined; in other words, the regional fluctuations are approximately the same in all preparations. In man and the Macaca, the transmission in the macular area is approx. 20% less than in the paramacular regions; this difference is not fully explained by the extinction of the background mottling in the macular area in fluorescence angiography.