Under these cirunmaces, road users could fail the government’s standard of vision for driving test which could see drivers prosecuted.
Half a million road users do not wear their prescription lenses in sunny weather and also do not wear sunglasses.
Not wearing glasses at all could pose a safety risk as road users are offered no protection from being dazzled by the sun.
Steve Barrett, head of motor insurance at Direct Line has warned drivers pose a “real danger” to the safety of themselves and other road users by not wearing appropriate sunglasses.
He said: ““We urge all motorists to wear appropriate eye protection and prescribed lenses including prescription sunglasses whilst driving.