Bhavana Sharma is currently the Head of Department of Ophthalmology and Dean Examinations at All India Institute of Medical Sciences, Bhopal, India. She completed her graduation and postgraduation from the Regional Institute of Ophthalmology, Bhopal, and was conferred with gold medal for the best outgoing postgraduate student. She further completed her training in cornea and cataract from Dr RP Centre AIIMS, New Delhi. She specializes in Cornea, Cataract and Ocular Surface Diseases. She is presently deliberating her academic, clinical and administrative duties at AIIMS Bhopal in addition to being in charge of cornea clinic and eye bank services. She has numerous publications in international and national journals to her credit, in addition to chapters in various books. She serves as a reviewer for major international and national journals and text books, in addition to being an editorial board member of prestigious international ophthalmology journals. She has been conferred with achievement award of All India Ophthalmological Society for significant contribution towards academics. She has presented more than 150 papers in various conferences and has been awarded best paper awards of cornea, cataract and trauma sessions and the most coveted Best of Best Paper Award. She is frequently invited as guest faculty by various organizations to deliver guest lectures and chair scientific sessions in addition to conducting instruction courses. She has served as vice president, treasurer and general secretary of divisional ophthalmic societies in addition to chair of various institutional and government committees. Jeewan S. Titiyal completed his graduation, postgraduation and training from All India Institute of Medical Sciences (AIIMS), New Delhi, and is presently the chief at Dr Rajendra Prasad Centre For Ophthalmic Sciences, AIIMS New Delhi. His areas of expertise include cataract surgery keratoplasty, refractive surgery, stem cell transplantation, contact lens and low vision aids. He has dedicated his academic career to the pursuit of excellence in the field of Ophthalmology, and this book is a part of his endeavours to transmit knowledge and skills to the generation of Ophthalmologists. He has been invited by various organizations to deliver keynote addresses, orations and guest lectures and chair scientific sessions. Dr Titiyal is the first Indian to perform live surgery at the American Society of Cataract and Refractive Surgery (ASCRS), USA. He has to his credit numerous publications in peer-reviewed journals and various books and chapters as well. He has been awarded the ‘Senior Achievement Award’ by the American Academy of Ophthalmology (2016), the ‘Achievement award’ by the Asia Pacific Academy of Ophthalmology (2015), the APACRS Educator Award (2015), the prestigious RP Dhandha Award and P. Siva Reddy Award by the All India Ophthalmological Society and numerous gold medals. The ‘Padma Shri’, one of the highest civilian awards in 2014, was conferred on him in recognition of his exemplary contributions in the field of medicine by the Government of India.