| ICD9 = | ICDO = | Image = | Caption = | OMIM = | MedlinePlus = 001045 | eMedicineSubj = ent | eMedicineTopic = 224 | DiseasesDB = 11950 | MeshID = D011304 | }} Presbycusis, or age-related hearing loss, is the cumulative effect of aging on hearing. Also known as presbyacusis, it's defined as a progressive bilateral symmetrical age-related sensorineural hearing loss. The hearing loss is most marked at higher frequencies. Presentation Deterioration in hearing has been found to start very early,… (More on Presbycusis)