27:, the only published record of his work. Based on his work, it is believed that he lived most of his life in Italy but had travelled to northern Africa. His work was translated and incorporated into many European language works and included instructions for cataract treatment. The earliest known English work that incorporates his teachings is
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which had connections to Arab medicine. The text claims that
Grassus learnt from a variety of sources and practiced by travelling to various places both in the temperate and tropic areas. He quotes Hippocrates, Galen, Johannicius and Hunayn bin Ishaq of Baghdad.
19:(also called Benevenutus Grapheus/Crassus or Benvenuto Grassi of Jerusalem) (c. 1200-c. 1290) was a medieval eye doctor who lived in the second half of the thirteenth century and is known for his treatise on the treatment of eye disorders
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35:(1583). The oldest printed version of his book is edited by Severino of Ferrara from 1474. A copy of this was translated into English by
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Rubin, Jonathan; Linde, Cornelia (2014-05-04). "Western
Medicine for the Masters of Damascus: Benvenutus Grapheus's Experimenta".
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Meyerhof, Max (1937). "Review: Memorandum Book of a Tenth-Century
Oculist by Casey A. Wood".
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103:"A Thirteenth-Century Ophthalmologist, Benvenutus Grassus: His Treatise and its Survival"
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47:(" The Oculists' Memorandum Book ") which was probably published in the 11th century.
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A study of a German translation has suggested that
Grassus studied at the
77:"Benvenutus Grapheus of Jerusalem, an oculist in the era of the Crusades"
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in 1929. The work of
Benvenutus Grassus also made use of the works of
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Israel
Journal of the History of Medicine and Science
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17:Benevenutus Grassus Hierosolimitanus
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227:13th-century Italian physicians
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25:De probatissima arte oculorum
232:13th-century Italian writers
199:10.1080/09503110.2014.915108
75:Kedar, Benjamin Z. (1995).
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119:10.1177/014107689809100119
21:Ars Probatissima Oculorum
101:Eldredge, L M (1998).
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187:Al-Masāq
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