<unk>  can occur at any age. Hearing loss that is present before a child learns to speak is classified as prelingual or congenital. Hearing loss that occurs after the development of speech is classified as postlingual.
Nonsyndromic deafness
Cortical deafness
Post-lingual deafness
Prelingual deafness
Hearing loss with craniofacial syndromes
Surface dyslexia
Infantile esotropia
Vibroacoustic disease