 Diseases of the eye were further expanded upon during this era by ʻAli ibn ʻIsa al-Kahhal or Ibn Isa (died c. 1038), who practiced and taught in the Al-Adudi Hospital in Baghdad.He wrote and developed the "Tadhkirat al-kaḥḥālīn" (“The Notebook of the Oculist”), which detailed more than 130 eye diseases based on anatomical location.The work was separated into three portions consisting of 1) Anatomy of the eye, 2) Causes, symptoms and treatments of diseases, and 3) Less apparent diseases and their treatments.