1. Biochemistry Department, College of Sciences, King Saud University , Riyadh , Saudi Arabia
2. Department of Pharmacognosy, Pharmacy College, King Saud University , Riyadh , Saudi Arabia
3. Department of Pharmacognosy, National Research Centre , Giza , Egypt
4. Department of Ophthalmology, Faculty of Medicine, Cairo University , Cairo , Egypt
5. Department of Optometry, College of Applied Medical Sciences, King Saud University , Riyadh , Saudi Arabia
6. Pharmacy College, King Saud University , Riyadh , Saudi Arabia
7. Central Laboratory, Female Centre for Scientific and Medical Studies, King Saud University , Riyadh , Saudi Arabia