Dr Luu first met Dr Choyce in 2005 when he visited her hospital in Da Nang, Vietnam, while planning a Flying Eye Hospital programme.
At the time, Dr Luu was the only paediatric anaesthetist in her hospital and for miles around. She was nervous, so would only treat patients five years or older.
When the Flying Eye Hospital visited, she was carefully trained by Dr Choyce and began to grow in skills and confidence.