Changing patterns in cataract surgery indications, outcomes, and costs, 2012–2023: a retrospective study at Aravind Eye Hospitals, IndiaResearch in context - Sachin Gupta; Ravindran D. Ravilla; Haripriya Aravind; Shivkumar Chandrashekharan; Thulasiraj D. Ravilla (The Lancet Regional Health - Southeast Asia, 2025)