The training of qualified ophthalmologists holds paramount significance in preventing blindness, treating eye diseases, and delivering optimal eye health services to the people. Given the unique nature of standardized residency training across geographical regions, this study delves into the comparative analysis of ophthalmology residency standardized training systems in the Mainland and Hong Kong. Specifically, we examine the the similarities and disparities in multiple facets, encompassing trainees' profiles, faculty expertise, rotation phases and prerequisites, as well as assessment methodologies. Notably, the training system in Hong Kong has a duration of 6 years, approximating the combined length of standardized residency training and standardized specialist training. By comparing the differences, we aim to facilitate the refinement of ophthalmology residency education and training in Mainland China, tailored to our specific context, while also serving as a reference for advancing standardized ophthalmology specialist training initiatives.