 The practice included a hollow syringe (which he developed) and removing the cataract through suction.Although this procedure has further developed throughout the centuries, the basic treatment remains the same even today.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.