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Dāniyāl ibn Shuʿyā’s Ophthalmologic Question-and-Answer Textbook: A Study on Cairo Genizah Fragments of the Eleventh–Thirteenth Centuries

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Abstract

Various issues involving theoretical and practical dimensions of medicine have been studied by using the Cairo Genizah. However, there are few in-depth studies on medical education. This article focuses on the medieval Arabic ophthalmology textbook, Masāʾil wa-ajwiba fīʿilm ṣināʿat al-kuḥl (hereafter MI), written by Dāniyāl ibn Shuʿyā. This is a textbook that arranges ʿAlī ibn ʿĪsā’s Tadhkirat al-kaḥḥāllīn (hereafter TK) into the question-and-answer format. MI is a concise and comprehensive textbook that includes anatomy, physiology, diagnostics, therapeutics, and pharmacology. Whereas Ḥunayn ibn Isḥāq’s Masāʾil fī al-ʿayn is limited to theoretical knowledge, MI contains the total procedure from knowing nature of eye diseases to treatment, and enables readers to apply certain medicinal substances to specific situations. However, MI’s crucial defect is that it arranges treatment plans along one linear disease progression, and cut off many derivative plans. Schematic composition is the remarkable feature of MI. Dāniyāl ibn Shuʿyā adopted some medical categories, which had been recognized but left unused in earlier Arabic medical books, in order to present the content in the concise scheme. The content of MI basically follows that of TK; therefore, it does not contain remarkably new elements. However, since Dāniyāl ibn Shuʿyā arranged TK into the roughly fixed pattern, he occasionally had to fill omissions of TK with his original questions and answers. These new components were presumably referred to by later ophthalmologists such as Khalīfa ibn Abī al-Maḥāsin al-Ḥalabī.

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