Two Ballarat police officers have lost their final bid to have examinations into excessive force allegations against them held in secret after the High Court dismissed their appeal.

The officers have been fighting for the case to be investigated in private after the state's anti-corruption body IBAC moved to hold public hearings into the allegations last year.

The officers have lost three appeals to have their case kept secret.

IBAC was probing if the pair had used excessive force during the arrest and detention of a vulnerable woman in custody at the station.