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Songs about Kahhal:
Ibn Al-Hakim Al-Kahhal by Vastearth Orchestra from the Album A Garden Amidst Flames
Ya habiibi kahhal assuhuud (Oh My Darling, Eyeliner that Makes Me Sleepless)  by Mohammed Abdel Wahab from the Album Mohammed Abdel Wahab Vol. 2 /History of Arabic Song [Recordings 1927-1928]
Wiki information Kahhal:
ʿAlī ibn ʿĪsā al-Kahhal, surnamed "the oculist" was one of Islam's most famous ophthalmologists. He was known in medieval Europe as Jesu Occulist. He was the author of the influential Memorandum of the Oculists, where for the first time in the...