In terms of average age, the populations of both Britain and the US are getting older, gradually going grey and experiencing weakened vision, making glasses and contact lenses a crucial consideration for more and more drivers.
According to the US Census Bureau, almost one in four US citizens will be over the age of 65 by 2050. This alarming statistic has led the Billings Gazette to question how road safety may be affected in years to come.
Official figures show that road traffic accidents represent the second-most common cause of unintentional death for elderly US motorists.
"Some states require drivers over certain age limits to renew [their licences] in person and pass a vision test," the Montana newspaper reported.
Meanwhile, the Centers for Disease Control and Prevention urges older drivers to have their eyes checked regularly by a specialist doctor or optician, as well as wearing contact lenses or spectacles as required.
by Emily Tait