Who is this person?

[Eva Elisabeth]

Thanks Roger, fascinating info about the use of J.F. Dieffenbach's method! He was the first to successfully perform a myotomy for the treatment of strabismus (on a seven-year old boy in 1839), and the basic principles of his method have changed little since (just been refined).

You can read/download the book here, the drawings are in the very back, p.221ff.:
https://archive.org/details/ueberdasschielen00dief