That's the type of hearing loss caused by inner ear damage, either from genes or the environment.
Doctors with the University of Washington looked at more than two-hundred-twenty kids with hearing loss for the study.
About twenty-two percent also had some sort of eye disorder. Like nearsightedness, farsightedness or astigmatism.
Researchers say that especially early in life - hearing loss can cause delays in language, speech, cognitive and social development.