R&D, Advenio, Drishti Eye Hospital, Panchkula, Haryana, India. Department of Ophthalmology, Drishti Eye Hospital, Panchkula, Haryana, India. Department of Vitreo-retina Services, Mirchia Laser Eye Clinic, Chandigarh, India. Department of Retina and Uvea Services, Mirchia Laser Eye Clinic, Chandigarh, India.