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Ferdinand Monoyer: the man who corrected a million visions

  • The French ophthalmologist is renowned for his groundbreaking research on eye sight which led to him developing the Monoyer chart more than 100 years ago.
  • Eye test inventor Ferdinand Monoyer has been celebrated by Google with a winking Doodle
  • Ferdinand Monoyer was born in Lyon, France, in 1836.
  • Inspired by his father, who was a French military doctor, he decided to follow in his footsteps and study medicine at the University of Strasbourg.
  • He worked his way up to become Associate Professor of Medical Physics before moving to become the director of the Ophthalmic Clinic at the University of Nancy
  • The French ophthalmologist is famed for developing his Monoyer chart which measures visual acuity, or how well the retina focuses.
  • He introduced the chart at around the same time that Dutch ophthalmologist Herman Snellen developed his Snellen chart in 1862.
  • He developed the dioptre, the unit of measurement for the vision that's still used today. Dioptre measures the distance you'd have to be from text to read it.

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