Ferdinand Monoyer was a famed ophthalmologist, who created the first decimal eye chart back in 1872. The decimal eye chart are those sheets an eye doctor will tell you to try and read, while blocking one of your eyes. The chart features rows of letters of different sizes, getting larger towards the bottom.
The ophthalmologist and his methods became pioneers in the field of vision. Monoyer also took time to hide his own name inside of his original groundbreaking chart: The first letters of each line in descending order sell his last name, while the last letter from each line in decending order spell his first.
The original Monoyer chart has been mostly replaced with a newer version, the Snellen chart, which was invented shortly after Monoyer’s, and places the largest letters at the top.