A 1998 study of schoolchildren found that per thousand, 6–12 had some form of<unk>  and 0–5 had moderate to profound<unk> . It was estimated that in 1998 some 391,000 school-aged children in the United States had<unk> .
Unilateral hearing loss
Sensorineural hearing loss
Conductive hearing loss
Spatial hearing loss
Prelingual deafness
Bilateral vestibulopathy
Dichoptic presentation
Cortical deafness