Your Eyes, Your Licence: What Every Driver Needs to Know About Eye Health
Poor vision is a factor in around 1 in 5 road accidents. Yet most drivers have never been told which eye conditions they must report to DVLA — or what happens if they don't. This guide covers everything from detached retina to glaucoma, and the different rules for car and HGV licences.
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The Most Important Safety Check You Might Be Skipping
You check your mirrors. You check your tyres. You check your tachograph. But when did you last have your eyes tested?
Vision is the foundation of safe driving. Around 90% of all driving decisions depend on sight. Yet poor vision is estimated to be a factor in approximately 1 in 5 road accidents — and many of the conditions that cause it develop slowly, with no obvious symptoms until significant damage has already been done.
This guide is for everyone who drives — whether you hold a car licence, a motorcycle licence, or a Group 2 licence for HGV, bus, or coach. The rules are different depending on which licence you hold, and the consequences of getting it wrong can be severe.
The Legal Standards: What Your Vision Must Be
Group 1 — Car and Motorcycle Drivers
To hold a standard car or motorcycle licence, you must:
- Be able to read a number plate from 20 metres away (roughly the length of five parked cars)
- Have a visual acuity of at least 6/12 (0.5) on the Snellen scale, using both eyes together
- Have an adequate field of vision — at least 120° horizontal, with 50° either side of centre
- Have no double vision
You can use glasses or contact lenses to meet these standards — but if you need them, you must wear them every time you drive. Driving without your corrective lenses when they are required is a criminal offence.
Group 2 — HGV, Bus and Coach Drivers
The standards for professional drivers are significantly stricter:
- Visual acuity of at least 6/7.5 (0.8) in the better eye
- Visual acuity of at least 6/60 (0.1) in the other eye
- An uninterrupted horizontal visual field of at least 160°, with 70° left and right and 30° up and down
- No defects within the central 30° radius
- Corrective lenses must not exceed +8 dioptres
If you drive an HGV or bus for a living, your livelihood depends on meeting these standards. Regular eye tests are not optional — they are essential.
Conditions You Must Report to DVLA
You can be fined up to £1,000 for failing to tell DVLA about a medical condition that affects your driving. You may also be prosecuted if you are involved in an accident as a result.
The following eye conditions must be reported:
For all drivers (Group 1 and Group 2):
- Glaucoma
- Diabetic retinopathy (if laser treatment has been received)
- Double vision (diplopia)
- Night blindness (nyctalopia)
- Retinitis pigmentosa (even if only one eye is affected)
- Any condition affecting both eyes, or the remaining eye if monocular
- Any condition where a GP, optician, or specialist has advised you not to drive
For Group 2 drivers (HGV/bus/coach) — additional requirements:
- Any eye condition affecting either eye must be reported — not just both
- Retinal treatment in one or both eyes must be reported using form V1V
The key difference for professional drivers is significant: where a car driver might only need to report a condition if it affects both eyes, an HGV or bus driver must report it if it affects either eye. The bar is higher because the vehicles are larger and the consequences of an accident are greater.
Retinal Detachment: The Emergency Every Driver Should Know About
Retinal detachment is one of the most serious eye emergencies — and one of the most misunderstood.
The retina is the light-sensitive tissue at the back of the eye. When it detaches, it peels away from the blood vessels that supply it with oxygen and nutrients. Without urgent treatment, permanent vision loss follows.
The warning signs are distinctive:
- A sudden shower of new floaters — dark spots, threads, or cobwebs drifting across your vision
- Flashes of light, particularly in peripheral vision
- A dark shadow, curtain, or veil spreading across your vision from one side
If you experience any of these symptoms, stop driving immediately and go to A&E. Do not wait for a GP appointment. Do not drive yourself. This is a time-critical emergency — the sooner treatment begins, the better the outcome.
After retinal surgery, your vision will need to be assessed before you return to driving. For Group 2 drivers, any retinal treatment — in either eye — must be reported to DVLA using form V1V.
Other Conditions That Can Affect Your Licence
Glaucoma is often called the "silent thief of sight" because it typically has no symptoms in its early stages. It damages the optic nerve and causes gradual loss of peripheral vision — exactly the kind of vision you need to spot hazards at the edge of the road. By the time most people notice something is wrong, significant damage has already been done. Regular eye tests are the only way to catch it early.
Cataracts cause the lens of the eye to become cloudy, leading to blurred vision, glare sensitivity, and difficulty driving at night. They are extremely common with age and highly treatable — cataract surgery is one of the most successful operations performed on the NHS. If cataracts are affecting your ability to meet the driving vision standard, you must not drive until they are treated.
Diabetic retinopathy affects the blood vessels in the retina and is a complication of diabetes. If you have diabetes, you should be attending your annual NHS diabetic eye screening appointment. If you have received laser treatment for diabetic retinopathy, you must notify DVLA.
Age-related macular degeneration (AMD) affects central vision — making it difficult to read, see faces, or spot road signs clearly. If AMD affects both eyes, it must be reported to DVLA.
Practical Steps for Every Driver
Get regular eye tests. Adults should have an eye test at least every two years. If you have diabetes, a family history of glaucoma, or are over 40, ask your optician about more frequent tests. NHS eye tests are free for many people — check your eligibility at nhs.uk.
Wear the correct prescription. If your glasses or contact lens prescription has changed, update it. An outdated prescription is not just uncomfortable — it is dangerous.
Know the warning signs. Sudden floaters, flashes, or shadows are medical emergencies. Stop driving and go to A&E.
Tell DVLA when you need to. If in doubt, check the DVLA A–Z of medical conditions at gov.uk. The online reporting service takes minutes. The fine for not reporting is up to £1,000 — and the risk to yourself and others is far greater.
Where to Get Help
DVLA — Report an eye condition: gov.uk/eye-conditions-and-driving
DVLA — Retinal treatment and driving: gov.uk/retinal-treatment-and-driving
NHS — Find an optician: nhs.uk/nhs-services/opticians
Moorfields Eye Hospital — Patient information: moorfields.nhs.uk
RNIB — Support for sight loss: rnib.org.uk
Or visit the DriverWell Eye Health page [blocked] for a full breakdown of conditions, DVLA standards, and resources — all in one place.
This article provides general information only and is not a substitute for professional medical or optometric advice. DVLA standards are correct as of 2025 — always check gov.uk for the latest guidance. Sources: GOV.UK driving eyesight rules; DVLA visual disorders guidance; NHS.