1. Ophthalmology Department, Tanta University, Gharbeya Governorate, El Geish Street, Tanta 31111, Egypt
2. Public Health Department, Tanta University, Gharbeya Governorate, El Geish Street, Tanta 31111, Egypt
3. Botany Department, Faculty of Science, Tanta University, Gharbeya Governorate, El Geish Street, Tanta 31111, Egypt