Who has been dubbed the "father of optics",  Ibn al-Haytham or Ibn Yunus?
Ibn al-Haytham Ibn al-Haytham (also known by the Latinization Alhazen or Alhacen, full name "Abū ʿAlī al-Ḥasan ibn al-Ḥasan ibn al-Haytham " أبو علي، الحسن بن الحسن بن الهيثم  ) was a Muslim scientist, mathematician, astronomer, and philosopher. Ibn al-Haytham made significant contributions to the principles of optics, astronomy, mathematics and visual perception. He has been dubbed the "father of optics".
Hunayn ibn Ishaq Hunayn ibn Ishaq al-Ibadi (also Hunain or Hunein) (Syriac: ܚܢܝܢ ܒܪ ܐܝܣܚܩ‎ , Arabic: أبو زيد حنين بن إسحاق العبادي‎ ‎ ; ’Abū Zayd Ḥunayn ibn ’Isḥāq al-‘Ibādī ; Latin: "Iohannitius" ) (809 – 873) was a famous and influential Nestorian Christian scholar, physician, and a scientist from Mesopotamia, what is now Iraq. He and his students transmitted their Syriac and Arabic translations of many classical Greek texts throughout the Islāmic world, during the apex of the Islamic Abbasid Caliphate.