1Department of Instrumentation and Control Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, India
2Faculty of Software and Information Science, Iwate Prefectural University (IPU), Iwate 020-0693, Japan
3Department of Ophthalmology, Kasturba Medical College, Manipal Academy of Higher Education, Manipal 576104, India
4Department of Electronics and Computer Engineering, Ngee Ann Polytechnic, Singapore 599489, Singapore
5Department of Biomedical Engineering, School of Science and Technology, SUSS University, Singapore 599491, Singapore
6Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia