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It has long been the custom at Jena to celebrate annually the founding of the university by a philosophical address by the rector, who in 1931 happened to be the professor of ophthalmology. His theme was the development of vision and he traced that function from the earliest heliotropism of monocellular organisms and lowly plants through the ascending stages of vegetable and animal life to its highest development, the vision of man. During this exposition, the various corollaries of vision, such as color vision, central vision for near and for distance, visual fields, motor functions of the eye, and binocular depth perception, were briefly touched on as such function pertained to the life of the animal. He concluded that in man the visual organ had attained its highest development, although in certain animals isolated functions of the eye were differentiated to a higher degree. In proof of this he cited
Jenaer akademische Reden. JAMA. 1932;99(14):1198. doi:10.1001/jama.1932.02740660076039
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