About 1 in 1,000 children in the United States is born with profound deafness. By age 9, about 3 in 1,000 children have hearing loss that affects the activities of daily living. More than half of these cases are caused by genetic factors. Most cases of genetic deafness (70% to 80%) are<unk> ; the remaining cases are caused by specific genetic syndromes. In adults, the chance of developing hearing loss increases with age; hearing loss affects half of all people older than 80 years.
Nonsyndromic deafness
Cortical deafness
Post-lingual deafness
Prelingual deafness
Hearing loss with craniofacial syndromes
Surface dyslexia
Infantile esotropia
Vibroacoustic disease