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>In the first place, Philip was ordered to revere Zeus Ammon; in the second the prediction was made that Philip would lose an eye,46 the same eye with which he through a crack in the door (details Plutarch omits in ii 6) and glimpsed his wife in bed with Zeus (as a serpent)

>From a series of ancient literary and historical sources, a number of archaeological finds, and the paleopathological remains in the supposed tomb of Philip in Vergina, it can be deduced that the king was seriously wounded in his right eye during the siege of Methoni.
https://www.sciencedirect.com/science/article/abs/pii/S0039625703001802