1 Department of Pediatric Ophthalmology, Strabismus, and Neuro-ophthalmology, Miriam Hyman Children's Eye Care Centre, Child Sight Institute, L V Prasad Eye Institute, MTC Campus, Visakhapatnam, Andhra Pradesh, India.
2 Department of Pediatric Ophthalmology, Strabismus, and Neuro-ophthalmology, Nimmagadda Prasad Childrenfs Eye Care Centre, Child Sight Institute, L V Prasad Eye Institute, GMRV Campus, Visakhapatnam, Andhra Pradesh, India.
3 Vijaya Medical Centre, Visakhapatnam, Andhra Pradesh, India.