How effective are cochlear implants in restoring hearing?

Cochlear implants are highly effective for individuals with severe to profound sensorineural hearing loss who do not benefit from traditional hearing aids. They bypass damaged hair cells in the cochlea and directly stimulate the auditory nerve, allowing users to perceive sound. While they do not restore hearing to normal levels, many users experience significant improvement in their ability to understand speech and communicate effectively. Success varies based on factors like age at implantation, duration of deafness, and individual auditory training.