He also died in Lyon on July 11, 1912. He also invented the Monoyer chart, used to test visual acuity. He inserted his name in the chart.
Reading vertically from bottom to top on each side of the chart, one can read his name.
He was an Associate Professor of Medical Physics at the Faculty of Medicine of the University of Strasbourg in 1871. Later, he was director of the Ophthalmic Clinic of the Faculty of Medicine, University of Nancy from 1872-1877.
He was also Professor of medical physics at the Faculty of Medicine at the University of Lyon from 1877-1909. Monoyer died at the age of 76.
His tomb is located in the Cimetière de la Guillotière in Lyon.
A speech made in his honour by the President of Société nationale de Society Française Médecine Légale de Lyon during the November 11, 1912 session of the Société was concluded as such: "To the memory of this scholar, the Medical Society bows with respect and sadness. She has lost a friend who was also her counselor who knew to think and to reflect.".
On Saturday, July 13, 1912, a long procession of friends and members of the Faculty of Medicine at the University of Lyon accompanied Professor Monoyer to his final resting place. Professor Hugounenq traced Monoyer"s career as chair at the University of Lyon, Associate Professor Nogier spoke on behalf of the students of the late master and Doctor Louis Dor made a speech on behalf of the Ophthalmological Society of Lyon.