Eyesight is the only driving standard you can lose without a single bad decision behind the wheel. Vision deteriorates gradually, the licence does not retest it, and the legal duty to keep the DVLA informed sits with the driver. GOV.UK’s driving eyesight rules set the floor for everyone, and a considerably higher bar for lorry and bus drivers - the people haulage fleets employ.
Two tests define the floor for all drivers:
You must also have an adequate field of vision - your optician can test it. And the enforcement hook is immediate: at the start of the practical driving test, you have to read a number plate on a parked vehicle. Fail that and the test does not continue, DVLA is told, and the licence is revoked.
If you need glasses or contacts to meet the standards, you must wear them every time you drive. And you could be prosecuted if you drive without meeting the standards of vision.
Vocational drivers face a stricter standard:
There is one grandfathering provision: you may still be able to renew a lorry or bus licence if you cannot meet these standards but held your licence before 1 January 1997.
Drivers must tell DVLA about any problem with their eyesight that affects both eyes, or the remaining eye if they have sight in only one. Lorry and bus drivers must report a problem affecting either eye.
What does not need reporting: being short-sighted or long-sighted, colour blindness, or having had surgery to correct short sightedness as long as you can meet the standards.
When a reported condition affects vision, DVLA may refer the driver for an eyesight test with its contracted optician - free of charge - and then weighs all medical evidence in the licence decision. A driver who prefers their own optician can submit those results instead, provided the test includes an Esterman visual test; DVLA does not guarantee it will accept an outside test, and the driver pays for it themselves.
Eyesight duties sit with the driver, but the consequences land on the fleet. A driver prosecuted for driving without meeting the standards of vision is a driver off the road, and if the prosecution follows a collision, the operator’s systems come under the same spotlight: what did the fleet do to encourage eyesight checks, and did it ever let a known-impaired driver keep working?
Sensible fleets treat vision like medical fitness generally:
For operators, there is a practical wrinkle worth knowing: the number plate test is something any fleet can run in its own yard. A manager can check any driver against the 20-metre standard in two minutes with a parked car and a tape measure - a cheap screening habit that catches a failing driver before a police stop or a post-incident eyesight check does.
For car drivers the bar is a number plate at 20 metres and 6/12 acuity. For lorry and bus drivers it is 6/7.5 in the best eye, a 160-degree field, and a duty to report problems in either eye. Both groups carry the same continuous duty: if your eyesight changes in a way that affects your driving, tell DVLA - before an examiner, an insurer, or a prosecutor finds out first.