A pediatric ophthalmologist. Took fellowship on ROP in Storm Eye Institute, South Carolina, USA in 2001. DIrector of Hanoi Eye Hospital from 2020. The first doctor in Vietnam treated ROP by laser in 2001 and by anti-VEGF in 2009. More than 20 years experience on ROP treatment. Treated 100-150 rop babies per year from 2002-2005.