Recovery
At the moment, Berengar was sitting in his castle, having his eye looked over by his court physician Ewald. It had been a few days since his return from the battlefield, and his injury was well maintained due to the disinfectants used on it. Despite the horrendous nature of medieval medicine, the man seemed to be somewhat competent, having trained in his earlier years in the Byzantine Empire; he had access to many of the more enlightened views of medicine from the classical era and the golden age of Islam.
As such, he carefully observed Berengar's right eye, which had a vertical slash through it. Though the cut was not deep enough to kill, it had severed his retina and potentially the optical nerve. Of course, Ewald did not know such advanced information; after observing it, he made his diagnosis.