Arval, the group behind the research, is urging companies to ensure drivers have the tests as part of their duty-of-care responsibility.
Mike Waters, head of market analysis at Arval, said: “With duty of care coming to the fore among fleets, this result is surprising. Many firms are focusing on vehicle safety and driver behaviour under risk management initiatives but they must not forget driver health.
“At the heart of this issue is communication from companies about the importance of regular eye tests and communication from employees to make their employers aware if their eyesight has deteriorated.”
Employees have a duty under the motor license regulations to inform the Drivers Medical Group if their eyesight has deteriorated since their licence was issued. Failure to do so is a criminal offence and can incur a fine of up to £1,000.