Past-president of the Sociedad Panamericana de Cornea (PanCornea) associated to the Panamerican Association of Ophthalmology (PAAO), and participated as member of the Clinical Cornea Committee da American Society of Cataract and Refractive Surgery (ASCRS). Currently Board of Directors of the The Cornea Society (USA), PanCornea and of the Tear Film Ocular Surface Society (TFOS). Associated editor of the journals Cornea (USA), Ocular Surface (USA) and Journal of EuCornea (UK). Reviewer of the journals Ophthalmology (USA), Investigative Ophthalmology and Visual Science (USA), Cornea (USA) Journal Refractive Surgery (USA), British Journal of Ophthalmology (UK), Stem Cells and Development (USA), Graefes Archive for Clinical and Experimental Ophthalmology (Germany), Arquivos Brasileiros de Oftalmologia (Brazil) among others. Has experience in Medicine, acting on the following subjects: ocular surface, dry eye, amniotic membrane, corneal transplantation, stem cells and ocular immonology. Fator H: 36 (Scopus), 33 (ISI Web of Science) e 45 (Google Scholar), Data: 11/08/2023. Researcher 2 CNPq. Cited among the most influential scientists in the world according to the study (Updated science-wide author databases of standardized citation indicators