Academic Ophthalmology, Division of Clinical Neuroscience, School of Medicine, University of Nottingham, Nottingham United Kingdom. Kanupriya Dalmia Ophthalmic Pathology Laboratory, L V Prasad Eye Institute, MTC Campus, Bhubaneswar, India. Ophthalmology Department, Nottingham University Hospitals, Queens Medical Centre, Nottingham United Kingdom. Ocular Microbiology Service, L V Prasad Eye Institute, MTC Campus, Bhubaneswar, India. Ophthalmology Department, Zayed Military Hospital, Abu Dhabi, United Arab Emirates. Cornea and Anterior Segment Service, L V Prasad Eye Institute, MTC Campus, Bhubaneswar, India. Academic Ophthalmology, Division of Clinical Neuroscience, School of Medicine, University of Nottingham, Nottingham United Kingdom Harminder.Dua@nottingham.ac.uk profdua@gmail.com. Kanupriya Dalmia Ophthalmic Pathology Laboratory, L V Prasad Eye Institute, MTC Campus, Bhubaneswar, India Harminder.Dua@nottingham.ac.uk profdua@gmail.com.