NEARLY two-thirds of older people in Yorkshire use only one hearing aid rather than the necessary two, says a company.
Specsavers - who deal in hearing aids as well as sight aids - say that 67% of pensioners have hearing problems but only 4% wear a device in both ears.
A spokesman said: "To hear properly our brains interpret sounds from both ears to orientate ourselves.
"Wearing hearing aids in both ears is essential to identify where other people are or which direction traffic is coming from."
He said not fitting two devices could harm older people's mental health.
He added: "People can become isolated and depressed for years before addressing the situation.
"Hearing aids do not have to be expensive and can radically alter people's lives."