Single-Sided Deafness: A Narrative Review

Background and Aims: Single-sided deafness (SSD) is a severe type of hearing loss affecting one ear, and it frequently presents social difficulties for those affected. Head shadow effect and sound localisation play an important role in speech perception. Methods: Research articles on SSD were identified through an online search of PubMed, Scopus, Medline, and Google Scholar databases. Results: SSD affects daily activities and emotional or social well-being. It is necessary to get the early identification of the aetiology of SSD for prompt intervention. The aetiology of SSD can be determined with the use of investigations such as as genetic testing, serological testing, computed tomography (CT) scan, magnetic resonance imaging, and DNA testing for viral infections. Rehabilitation options for patients with SSD include cochlear implants, bone-anchored hearing aids, and contralateral routing of sound. Individuals with SSD cochlear implants have strong auditory perception. The objective of this review article is to provide aetiology, clinical presentations, diagnosis and current treatment of SSD. Conclusion: Individuals with SSD commonly experience communication issues that have a substantial negative effect on their quality of life. Word discrimination is hampered by SSD, and this impairment varies depending on the affected ear’s residual hearing. Speech comprehension is frequently difficult for patients with severe SSD, especially in noisy environments.