Back in the simpler days of “science” people often believed maladies were inflicted upon their bodies by witches, who used evil spells to terrorize the good Christian folk on behalf of Satan.
Belief in witchcraft was extremely common in the 16th century, and yet the Scientific Revolution was making people seek more concrete explanations for their afflictions.
German physician Georg Bartisch attempted to provide these answers with his illustrations, and he spent his whole life studying eye diseases and their cures and became a pioneer in the field of ophthalmology.
Georg also believed witchcraft was often the cause of eye disease, and thought horoscopes and astrological charts were an important part of diagnosing and curing these diseases.