The legal vision standard for driving is being contravened by one in three UK road users, figures suggest.
A survey also revealed that drivers are unaware of their vision failings, as more than four out of five people who were found to have substandard vision claimed that theirs was good enough to drive safely.
Vision screenings have been undertaken by Specsavers at county shows and town centres in the UK this year, as part of the optician's annual Drive Safe Roadshow.
The general findings were that people's perception of their eyesight standards is very poor.
The same survey found that more than four out of five people think an eye examination should be compulsory when renewing a licence, and almost all drivers surveyed said they would consider a regular eye examination if it affected theircar insurance .
However, in reality, the survey found that the recommended timeframe for having sight checked, of once every two years, was being ignored by two out of five people.
Copyright Press Association 2012