The global climate crisis demands that all sectors of healthcare, including ophthalmology, examine their environmental footprint and explore more sustainable ways of working. This collection brings together articles that highlight both the challenges and opportunities in making ophthalmology more sustainable. From the environmental impact of single-use instruments and surgical procedures, to the role of policy, procurement, and education in driving change, these articles reflect a shared commitment across the community to deliver high-quality patient care while protecting the environment. Further resources: https://www.rcophth.ac.uk/our-work/sustainability/