1. College of Medicine, Qassim University, Buraydah 52571, Saudi Arabia
2. College of Medicine, Umm Al-Qura University, Mecca 24382, Saudi Arabia
3. College of Medicine, Imam Mohammed Ibn Saud Islamic University, Riyadh 11564, Saudi Arabia
4. College of Medicine, King Saud Bin Abdulaziz for Health Sciences, Riyadh 14611, Saudi Arabia
5. Ophthalmology Consultant, Ophthalmology Department, King Fahad Armed Forces Hospital, Jeddah 23311, Saudi Arabia