1. Vision Science Graduate Program, The University of Alabama at Birmingham, Birmingham, Alabama, United States
2. Department of Ophthalmology, Menoufia University, Shebin Elkom, Menoufia, Egypt
3. Department of Ophthalmology and Visual Sciences, The University of Alabama at Birmingham, Birmingham, Alabama, United States
4. Department of Biomedical Engineering, The University of Alabama at Birmingham, Birmingham, Alabama, United States
5. Department of Biostatistics, The University of Alabama at Birmingham, Birmingham, Alabama, United States