She obtained her PhD from University Paris 1 in 1998.
Weygand is a specialist of disability history, especially the history of blind people in France from the Middle Ages to the beginning of the XXth century.
She is part of the Annales School, and her scholarship focuses on the history of individual and collective representations of blindness, organisations supporting blind people, and the pedagogical techniques developed for blind pupils during the XVIIIth and XIXth century.
She was born in Paris.