Glasses and Contact Lenses on Your Driving Test in 2026: The DVSA Eyesight Rules Explained

The shortest way to fail a driving test in 2026 is to fail the eyesight check before you have even sat in the car. It happens in the test centre car park, it takes about a minute, and if you cannot read the number plate the examiner terminates the test on the spot — no refund, no drive, and a report to the DVLA.

If you wear glasses or contact lenses, the rules are simple but strict. Here is exactly what applies to your practical test.

The 20-Metre Number Plate Rule

Before the test starts, the examiner walks you to a suitable spot and asks you to read a number plate on a parked car. For current-style plates the distance is 20 metres — roughly the length of five parked cars. Older-style plates use a slightly longer distance of 20.5 metres.

You may wear glasses or contact lenses to do this. What you must not do is guess. If you cannot read it, say so; the examiner will offer another plate, and can let you move closer to establish whether you are within the legal standard.

If You Need Glasses or Lenses, You Must Wear Them

The rule is not “wear them for the eyesight check”. It is that if you need corrective lenses to meet the standards of vision for driving, you must wear them every time you drive — including for the whole of your practical test, and every drive afterwards.

Practically, that means:

• If you passed the check wearing glasses, keep them on for the drive. Taking them off mid-test is a serious matter, not a personal preference.
• If you wear contact lenses, wear them for the check and the drive. Do not switch to glasses halfway through.
• Your licence will carry a code showing that corrective lenses are required, and it stays there until an optician confirms otherwise.

What Happens If You Fail the Eyesight Check

This is the part learners underestimate. If you cannot meet the standard:

1. The examiner records it as a serious fault and the test is terminated before you drive.
2. You do not get a refund of the DVSA test fee.
3. The DVLA is informed and can revoke your provisional licence under the Road Traffic Act until your vision is corrected and confirmed.
4. You will need evidence from an optician, and a new eyesight check, before you can be relicensed and retest.

None of this is a punishment. It is a road safety standard: at 20 metres you are seeing roughly what you need to see to react to a child stepping out or a brake light ahead.

The Wider Standard: Visual Acuity and Field of Vision

The number plate check is a quick proxy for a broader legal standard. To drive a car you must also have visual acuity of at least 6/12 on the Snellen scale — with glasses or lenses if you need them — using both eyes together, or in your one eye if you have sight in only one. You must also have an adequate field of vision, which your optician can assess.

Some conditions must be declared to the DVLA regardless of how well you can read a plate, including certain forms of glaucoma, diabetic retinopathy affecting both eyes, and sight loss in one eye in some circumstances. If you are unsure, ask your optician and declare it. Driving without meeting the standard is an offence.

Practical Tips for Test Day

1. Have an eye test before you book. Prescriptions drift, especially in your teens and twenties. An out-of-date pair is a common cause of a borderline result.
2. Bring a spare pair of glasses if you have one. A broken frame in the car park should not end your test.
3. Carry a lens case and solution if you wear contacts, and put fresh lenses in that morning rather than wearing a pair you slept in.
4. Avoid heavily tinted lenses. Sunglasses are fine in bright conditions on the drive, but they are not appropriate in poor light, and you should be ready to remove them.
5. Clean your glasses before you leave. Smeared lenses on a wet morning cost you clarity you cannot afford.
6. Do not memorise plates in the car park. The examiner will pick one you have not studied, and pretending is worse than admitting difficulty.
7. Practise reading plates at 20 metres at home with a supervising driver so you know your real limit.

How Exam Routes App Can Help

Once the eyesight check is out of the way, the rest of the test is about familiarity. The Exam Routes App gives you real test routes with turn-by-turn navigation so you can practise the roads around your test centre properly — including in the low-light and wet conditions where good vision and good planning matter most.

Frequently Asked Questions