title: Eye colour and susceptibility to noise-induced permanent threshold shift.
abstract: 257 3rd-year apprentices were given ear, nose and throat examination, electroacoustic impedance tests and audiometry. Their eye colour was also recorded. Average hearing levels of otologically normal left ears were poorer at 4 kHz (p less than 0.05) for apprentices with eye colours indicating no melanin pigmentation of the iris than for apprentices with melanin iris pigmentation.
mesh_terms: D000158:Acoustic Impedance Tests; D001299:Audiometry; D005127:Eye Color; D006317:Hearing Loss, Noise-Induced / Q000175:diagnosis*; D006801:Humans; D008543:Melanins
chemical_list: D008543:Melanins