Dyonne Hartong, MD PhD, is an orbital, lacrimal and oculoplastic surgeon at the Orbital Center of the Amsterdam University Medical Center in Amsterdam, the Netherlands. She did her research fellowship in Boston at the Massachusetts Eye and Ear Infirmary, Boston, USA, and her clinical fellowship at the Rotterdam Eye Hospital, the Netherlands. She is a member of the advisory board of the Dutch Orbital Society and member of the European society of Ophthalmic Plastic and Reconstructive Surgery.