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Hunayn ibn Ishaq's ''Book of the Ten Treatises of the Eye'' is a 9th-century theory of vision based upon the cosmological natures of pathways from the brain to the object being perceived. This ophthalmic composition is heavily derived from Galen's ''De placitis Hippocratis at Platonis'' and ''De usu partium'', both in terms of the anatomy and physiology being described. Hunayn's triumph comes from the systematic presentation of the parts of eye and the subsequent additions he made to the cosmological aspects of the work. Its early translation to Latin also provided a means for medieval ophthalmologists in the West to come into contact with the work of Galen.〔Lindberg, David C.(1996). Theories of vision from al-Kindi to Kepler . Chicago: University Of Chicago Press. pp. 33–34〕 ==Overview== There are four essential doctrines that shape Hunayn's dissertation on vision and the anatomy of the eye: *Structural order – the individual components of the eye each have their own nature, and are arranged so that they are in cosmological harmony. *Medical teleology – the existence of each of these individual components is dictated by their ultimate purpose, vision. Their secondary purpose, guided by their immediate nature, dictates how vision will be achieved. *The elements – each of the four elements of earth, fire, air and water corresponds to a single sense. The fifth sense is a combination of two of the four elements described. *Applicability of components – the effectiveness of each of the five senses depends largely on a component which is like the object of its sensation. Hunayn relies on these principles to build up his conception of vision, which incorporates the anatomy of the eye in a way that makes discussion of one without the other unproductive.〔Eastwood, Bruce Stanfield. "The Elements of Vision: The Micro-cosmology of Galenic Visual Theory According to Hunayn Ibn Ishaq." Transactions of the American Philosophical Society 72 part 5(1982): 1–2.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Book of the Ten Treatises of the Eye」の詳細全文を読む スポンサード リンク
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