Road safety and your eyes
Poor vision causes an estimated 2900 road casualties a year. So, we all need to be able to see clearly when in charge of a vehicle. In the wrong hands, a vehicle can be dangerous. It is everyone’s responsibility to ensure they have their eyes checked and have an up to date prescription. We can also influence family and friends to have their eyes checked too, helping to make the roads we drive on safer.
Driving Eyesight Rules 
You must be able to read (with glasses or contact lenses, if necessary) a car number plate made after 1st September 2001 from 20 metres.
You must also meet the minimum eyesight standard for driving by having a visual acuity of at least decimal 0.5 (6/12) measured on the Snellen scale (with glasses or contact lenses, if necessary) using both eyes together or, if you have sight in one eye only, in that eye.
You must also have an adequate field of vision – your optician can tell you about this and do a test.