A/Prof. Do Tan is the chief of glaucoma department in Vietnam national Eye Hospital, He works as sub-specialty consultant (glaucoma) and general consultant, vitreo-retinal consultant; he can use many kinds of laser: ALT, SLT, Laser peripheral iridotomy, trans-scleral cyclodestruction, Laser iridoplasty… and at the same time, being a competent surgeon with various types of surgery such as about 20 000 phacos, 6 000 trabeculectomies, nearly 1000 deep sclerectomies, 1000 scleral buckling, 3000 vitrectomies for Malgnant Glaucoma, RD, endophthalmitis, familiar with every kind of phaco machines: from simplest to very modern ones like: Millennium, Infinity, Sovereign, Centurion; vitrectomy machines: Nidek, Accurus,Constellation. Being an expert in using quick-chop technique for hard and very hard cataracts and in doing Endoscopy assisted vitrectomy for malignant glaucoma, intraocular infection and retinal detachment. In addition, he is alsoa enthusiatic researcher and teacher and is spending a lot of time involving in some regional and international studies as TVT Asia, QPI 1007, Genetics in glaucoma.Since 2024, he has been appointed as Vice Chief of Eye Department, University of Medicine and Pharmacy, Vietnam National University, Hanoi. He contributed as main authors and co-authors in some highly cited publications on Journal of Glaucoma, Clinical Ophthalmology, EYE, JAMA Ophhthalmology and Nature Genetics.