Three ophthalmology professors from the School of Medicine, Xiamen University, have been named to the 2026 World's Top 2% Scientists list. The ranking was recently released by Stanford University Professor John P. A. Ioannidis and his team in collaboration with academic publisher Elsevier.
Professors Liu Zuguo and Li Xiaoxin were named to both the career-long and single-year impact lists, while Professor Li Wei was included on the single-year list.
A total of 1,783 researchers worldwide were included in the career-long list for ophthalmology and optometry, while 1,804 made the single-year list. Among the 129 Chinese scholars named to the latter, Professor Liu ranked fifth among researchers in the Chinese mainland.
The ranking draws on Scopus data to evaluate research impact among nearly 10 million scientists worldwide. A composite score, or c-score, is calculated from six key indicators, including citation counts, the h-index, the hm-index adjusted for co-authorship, and citations to single-authored or first-authored papers.
Covering 22 disciplines and 174 subdisciplines, the list identifies scientists whose research impact places them among the top 2% globally. The career-long list reflects scholarly influence across a researcher's entire career, while the single-year list focuses on academic achievements in the previous year.
