Drivers who have been advised to wear spectacles while driving have been urged to do so as the clocks go back and the nights draw in.
The College of Optometrists said 60% of drivers have been advised to wear glasses while driving but 24% admitted they do not always wear them.
Daniel Hardiman-McCartney, clinical adviser at the College, said: ‘In low light conditions, the pupils of your eyes become larger to allow more light in, but the wider divergence of light rays or light scattering can make your vision blurry.
‘This means that if you wear glasses for distance vision you become more reliant on your distance glasses on darker days and nights, and especially when driving at night.’
He added it was important to ensure windscreens were clean inside and out, as well as ensuring prescriptions were up-to-date and frames were free-from dirt and scratches.
A College survey found 76% of respondents had been dazzled by oncoming headlights, which it said was a prominent risk because of LED headlamps and more SUV-type vehicles on the road.
Other driving challenges cited by drivers were driving in rain, fog or snow (42%) and not being able to see potholes in the road (29%).
Eighteen per-cent of drivers surveyed were worried about not being able to see a cyclist while driving in the dark and 17% were worried they would miss seeing a pedestrian.