It is a mistake for new users of hearing instruments to think that they will immediately restore their hearing to a natural level much in the way that prescription eyeglass lenses correct a refractive error. While glasses correct vision instantly and to near-perfection, a hearing instrument requires a period of adjustment on the part of the user. It takes time, practice, and experience for the ears and the brain to get used to the new sounds produced by the hearing instrument. In fact, according to most hearing specialists and audiologists, it can take up to six months for the majority of new users (depending on the severity of the hearing loss) to adjust to their new sense of hearing.
Successful hearing aid users will tell you that the benefit of wearing hearing aids is much greater than the effort it may take to adjust them.