Ferdinand Monoyer
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Ferdinand Monoyer (9 May 1836 – 11 July 1912) was a French ophthalmologist, known for introducing the dioptre in 1872. He invented the
Monoyer chart The Monoyer chart was created by Ferdinand Monoyer and is used to test visual acuity. He inserted his name in the chart; reading upwards on both ends, but ignoring the first line, the name "Ferdinand Monoyer" can be seen. See also *Snellen chart ...
, used to test
visual acuity Visual acuity (VA) commonly refers to the clarity of vision, but technically rates an examinee's ability to recognize small details with precision. Visual acuity is dependent on optical and neural factors, i.e. (1) the sharpness of the retinal ...
. He inserted his name in the random letters of the chart. It appears when one reads vertically from bottom to top on each side.


Biography

Monoyer was of Alsatian heritage by his mother and his father was a French military doctor. He was an associate professor of medical physics at the Faculty of Medicine,
University of Strasbourg The University of Strasbourg (french: Université de Strasbourg, Unistra) is a public research university located in Strasbourg, Alsace, France, with over 52,000 students and 3,300 researchers. The French university traces its history to the ea ...
in 1871. Later, he was the director of the Ophthalmic Clinic of the Faculty of Medicine,
Nancy-Université Nancy-Université federated the three principal institutes of higher education of Nancy, France, Nancy, in Lorraine (region), Lorraine, France before their merger into the University of Lorraine: * Henri Poincaré University (UHP, also known as ...
from 1872 to 1877. He was also professor of medical physics at the Faculty of Medicine,
University of Lyon The University of Lyon (french: Université de Lyon), located in Lyon and Saint-Étienne, France, is a center for higher education and research comprising 11 members and 24 associated institutions. The three main universities in this center are: C ...
, from 1877 to 1909.


Death

Monoyer died at the age of 76 years. His tomb is located in the Cimetière de la Guillotière in Lyon. On Saturday 13 July 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 Louis Dor made a speech on behalf of the Ophthalmological Society of Lyon. The speech made in Monoyer's honour by the president of ''Société nationale de Médecine de Lyon'' during 11 November 1912 session of the ''Société'' was concluded as such: "To the memory of this scholar, the Medical Society bows with respect and sadness; it has lost a friend who was also her counselor who knew to think and to reflect."


References

French ophthalmologists 1836 births 1912 deaths University of Strasbourg faculty Nancy-Université faculty University of Lyon faculty {{France-med-bio-stub