Guilhem Escalier joined Essilor in 2009 after 4 years in bio-photonic research. He holds a physics/optics engineering degree from Paris-Sud Orsay, France. From 2009 to 2013, he worked in Essilor’s Instrument department on a new optical centering system. Since 2013, he has been member of Essilor International’s Research and Development team, working as a study manager in the Life and Vision Science department. His research focuses on the personalization of progressive lenses.