Some reflective properties of the tapetum lucidum of the cat's eye

摘要: 1. Observation of the fresh, isolated tapetum cat with a low-power microscope showed it to be composed multilayer reflectors (domains) each being less than 6 μm in diameter. It is concluded that these are subdivisions intracellular bundles rodlets seen electron micrographs. 2. Apparatus was devised for illuminating single domain pencil white light and observing colour direction reflected light. 3. Those domains which lie near vitreal surface tend reflect blue deeper ones longer wave-lengths; this attributed differences layer spacings domains. 4. Each has set reflecting planes lying within 15° general plane tapetal surface. In addition, many have surfaces inclined at angles greater 20° also can visible light. 5. The mechanism reflexion discussed relation latticelike structure domain. 6. suggested under some conditions nature may lead significant local variations spectral sensitivity visual system.