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Ferdinand Monoyer, French ophthalmologist, invented the Monoyer chart (died 1912)

Historical image related to Ferdinand Monoyer, French ophthalmologist, invented the Monoyer chart (died 1912) from May 9, 1836

Ferdinand Monoyer

French ophthalmologist

Ferdinand Monoyer was a French ophthalmologist, known for introducing the dioptre in 1872.
Source: Wikipedia (CC BY-SA)

Monoyer chart

Medical diagnostic method

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.
Source: Wikipedia (CC BY-SA)