Monoyer Chart

By taking the first letter of each line from the last line, the word obtained is MONOYER, then by taking the last letter of each line always from the penultimate line, the word obtained is FERDINAND, both its first name and last name.

To be exact, it is written Monoyer DM, and DM certainly means Doctor of Medicine.

The other letters of each size do not mean anything and do not have a particular pattern, they are probably randomly selected:

Example: MRTVFUENCXOZD, DLVATBKUERSN, RCYHOFMESPA, EXATZHDWN, YOELKSFDI, OXPHBZD, NLTAVR, OHSUE, MCF, ZU

Monoyer
M R T V F U E N C X O Z D
D L V A T B K U E R S N
R C Y H O F M E S P A
E X A T Z H D W N
Y O E L K S F D I
O X P H B Z D
N L T A V R
O H S U E
M C F
Z U

Here is a PDF file to download: (link)

The Monoyer chart (or Monoyer test) is used by opticians for testing visual acuity in patients with impaired eye.

However, this ophtalmologic table to print tends to be outdated and replaced by others like Snellen chart, or more recently by tests on screens, and possibly prescribe visual aids (glasses).

The recommended distance for a 1:1 scale printed Monoyer Chart is 5 meters.