Driving Test Eyesight Check: Distance, Glasses & Automatic Fails
Before you get into the car. Before the examiner has even clicked their seatbelt. Before the 40 minutes of driving that most learners spend months preparing for. The examiner points to a parked vehicle somewhere down the street and asks you to read the number plate aloud. This is the only part of the UK driving test where a single wrong answer ends everything, instantly, with no second attempt, and with no refund on the £62 you just paid.
What the eyesight check actually involves
The eyesight check is the very first task of the practical driving test. The examiner stands with you outside, or sometimes conducts it from the car park, and identifies a parked vehicle at a specified distance. They ask you to read the number plate aloud. That's it. No chart, no covering one eye, no letters flashed on a screen. The examiner is assessing whether your vision meets the legal minimum standard for driving.
The required distance is 20 metres for modern number plates, which are plates issued after September 2001. Older plates, the style with slightly wider character spacing used on vehicles registered before September 2001, use a marginally longer distance of 20.5 metres. In practice, almost all plates you will encounter at a test are the modern style, so 20 metres is the working figure to keep in mind.
- Required distance (modern plates)
- 20 metrespost-September 2001 registration
- Required distance (old plates)
- 20.5 metrespre-September 2001 wider spacing
- Result of failing
- Immediate failtest ends, drive does not begin
- Refund if you fail?
- None£62 fee is non-refundable
Twenty metres is roughly the length of five average parked cars end to end, or about four standard parking bays. It is worth measuring that distance in your street or a local car park before your test so you have an accurate feel for it. What looks like a comfortable reading distance at 10 metres can feel different at double that.
What counts as failing the eyesight check
The standard is not subtle. If you cannot read the plate correctly, wrong characters, too many corrections, or clearly struggling to make out the letters at all, the examiner records a fail on the marking sheet and the test does not proceed. There is no 'try again from slightly closer'. The examiner does not give hints. If you misread a character and correct yourself immediately, the examiner will use their judgement, but repeated errors or obvious squinting at the plate are a fail.
It is also worth knowing that the examiner picks the plate. You cannot point to a car nearby with a cleaner or larger plate in the hope of getting an easier read. They choose, and their choice will be at the correct distance.
“The eyesight check is the only part of the driving test where a single reading ends everything, fail it and you never start the drive, no matter how good your three-point turns are.”
Can you wear glasses or contact lenses?
Yes. Glasses and contact lenses are both permitted for the driving test, and wearing either does not disadvantage you in any way. If you wear correction, you must tell the examiner before the eyesight check begins. This is part of the standard pre-test process, it is not a disclosure that affects whether you can take the test.
If you pass the test while wearing vision correction, your licence will include a condition code. Code 01 is added for glasses, code 02 for contact lenses. That code means you must wear that correction every time you drive. Driving without it after passing with it is a legal offence, equivalent to driving without a valid licence for the conditions on which it was granted.
| Glasses (Code 01) | Contact lenses (Code 02) | No correction needed | |
|---|---|---|---|
| Permitted in test | Yes | Yes | Yes |
| Must declare to examiner | Yes, before eyesight check | Yes, before eyesight check | Nothing to declare |
| Licence code added | 01, spectacles required | 02, contact lenses required | None |
| Must wear every time you drive | Yes, always | Yes, always | N/A |
| Worth keeping a backup | Spare pair in the car | Spare glasses as backup | N/A |
One edge case worth knowing: if you pass wearing contact lenses and later switch to glasses (or vice versa), you do not need to retake the test. Your licence records the type of correction used, but the underlying requirement is simply that you wear correction, the format can change. What you cannot do is quietly stop wearing any correction at all if your unaided vision no longer meets the standard. That's the part that carries legal risk.
How to gauge 20 metres before your test
The simplest check: find a residential street with on-street parking. Count roughly five car lengths along from a starting point, then try reading number plates at that distance. If any plate at that range is blurry, unclear, or requires effort to make out individual characters, you have a vision issue that needs an optician before test day.
The NHS Snellen chart used in standard eye tests is not an identical measure to the number plate standard. A Snellen result of approximately 6/12 in your better eye (with correction if worn) is the approximate equivalent, but if you have any uncertainty, tell your optician specifically that you want to confirm you meet the 20-metre number plate standard. They can test for that directly.
Preparing your eyesight before test day
Most learners never think about the eyesight check until the examiner asks for it. That is a mistake. The check takes under 30 seconds, costs nothing to prepare for, and is the only automatic fail that requires zero driving skill to trigger. A basic optician appointment four to six weeks before your practical test removes all risk from this part of the day.
- 👁Book an optician appointment 6 weeks out
Tell the optician you're preparing for your UK driving test. Ask them specifically to confirm you meet the 20-metre number plate reading standard. A routine sight test may not flag borderline cases, a targeted conversation will.
- 📏Do the home measurement test
Find a residential street and count five car lengths. Read plates at that distance without straining. If any character is unclear, this is your early warning signal, act on it weeks before the test, not hours before.
- 👓Pack your glasses or lenses the night before
If you use vision correction, lay your glasses case or contact lens kit out with your other test-day items the night before. There is no dispensation if you arrive at the test centre without them, the examiner cannot proceed and your fee is lost.
- ✅Declare your correction before the check
When you meet the examiner, let them know you wear glasses or lenses before they start the eyesight check. It is a standard part of the process and takes one sentence. Do not wait for them to ask, they may not.
What happens after an eyesight fail
If you fail the eyesight check, the test ends. The examiner records the fail on the DL25 marking sheet, the drive does not take place, and you leave the test centre. The £62 test fee is not refunded. The 10 working day minimum wait before rebooking applies exactly as it would after any other fail. You will also need to resolve the underlying vision issue, see an optician, get a prescription, and obtain appropriate correction, before sitting again.
There is an appeals process for cases where candidates believe the distance used was incorrect or the examiner made an error, but this is rare and not a route to take lightly. In the vast majority of eyesight check fails, the result stands. The straightforward path is to get vision tested and corrected, then rebook.
Eyesight standards after you pass
Passing the eyesight check does not mean your vision is assessed and filed away forever. If your eyesight deteriorates after you pass your test, you have a legal duty to inform the DVLA if you can no longer meet the 20-metre standard unaided or with current correction. Drivers who know their vision has worsened and continue driving without updating their correction or informing the DVLA risk prosecution.
Opticians generally recommend a sight test every two years for most adults. For drivers, keeping that appointment is not just a health check, it is part of staying legal on the road.
Sources and further reading
The figures, fees, and procedures referenced in this article are verifiable on the official gov.uk pages below. PassRates.uk is built on the Driver and Vehicle Standards Agency’s open data, published under the Open Government Licence.
Frequently asked questions
What happens if I can't read the number plate on my driving test?
The test ends immediately. A fail on the eyesight check is recorded on the DVSA marking sheet and the drive does not take place. You must wait at least 10 working days before rebooking and resolve the vision issue, by seeing an optician and getting appropriate correction, before your next attempt.
How far away does the number plate need to be read at a driving test?
20 metres for modern plates (registered September 2001 onwards). 20.5 metres for older pre-2001 plates with wider character spacing. In practice, you will almost always be reading a modern plate at 20 metres.
Do I need perfect vision to pass the driving test?
No. You must meet the minimum standard, approximately Snellen 6/12 in your better eye, which many people achieve with glasses or contact lenses. Perfect 20/20 vision is not required. What matters is that you can read a standard number plate at 20 metres, with or without correction.
Can I wear contact lenses for the driving test?
Yes. Contact lenses are fully permitted. You should tell the examiner before the eyesight check that you are wearing them. If you pass, code 02 (contact lenses required) will appear on your licence, and you must wear contact lenses or glasses every time you drive.
Do I get a refund if I fail the eyesight check?
No. The practical test fee (£62 weekday, £75 evening or weekend) is not refundable if you fail the eyesight check. The result is treated the same as any other test fail for rebooking and fee purposes.
What licence code is added if I wear glasses?
Code 01, spectacles required, is added to your driving licence if you pass the test wearing glasses. Code 02 is added for contact lenses. These codes are a legal condition of your licence, meaning you must wear the stated correction every time you drive.
Is the eyesight check the same for motorcycle Mod 2?
Yes. The Mod 2 motorcycle test uses the same 20-metre number plate standard, and the same rules on glasses and contact lenses apply. The Mod 1 off-road skills test does not include an eyesight check, that part only happens at Mod 2.
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