births
Ferdinand Monoyer, French ophthalmologist, invented the Monoyer chart (died 1912)
Ferdinand Monoyer
Ferdinand Monoyer was a French ophthalmologist, known for introducing the dioptre in 1872.
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.