The International Society for Geographical and Epidemiological Ophthalmology was founded in 1970 to promote the science of geographic and epidemiologic ophthalmology among all people and nations. To date, ISGEO has convened 26 Congresses, held in every region of the world in conjunction with a major eye meeting in the host country, the last one, 26th ISGEO Congress #ISGEO2025 was held at Tilganga Institute of Ophthalmology, Kathmandu on 27 & 28 April, 2025. The theme was ‘Countdown to 2030: Challenges and opportunities for research and data’.