Ear probes were instruments with very thin handles terminating in a blunt point at one end, while the other terminated in a small, flat, slanted, circular head. They were dipped in resin and might have been used to remove foreign bodies from the ear. Celsus also describes their application to remove maggots:
When maggots have appeared, if they are near the surface, they must be extracted by an ear scoop; if further in they must be killed by medicaments, and afterwards care taken that they do not breed.
Listen to the translation: