/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: debasishvcovs https://cdn.slidesharecdn.com/profile-photo-debasishvcovs-48x48.jpg?cb=1523768298 Debasish Kar Director Vidyasagar College of Optometry & Vision Science Calcutta, West Bengal, India Consultant Optometrist City Eye Care Centre Calcutta, West Bengal, India