Many people suffer from painful medical conditions. Pain is a sensation that’s triggered by a person’s nervous system, and it can be sharp or dull and constant or intermittent. A person can experience focal or diffuse pain, and that pain is the body’s way of telling a person that something is wrong in there, thus having one of the most important roles in protecting the body.
If today an eye surgery with laser is performed successfully on a daily basis, in the Middle Ages, medical procedures were horrible and rarely effective. The highest incidences of surgeries in ancient history, according to what artifacts suggest, seem to have taken place in South America (Bolivia, Peru etc.).