If you've been diagnosed with glaucoma, one of the first questions that might pop into your head is: can I still drive? It's a totally understandable worry. Your car means freedom, independence, getting to work or visiting family. The good news is that many people with glaucoma continue driving safely for years. But there are rules you need to follow, and understanding them now will save you stress later.

When you must tell the DVLA about glaucoma and driving

Here's the bottom line. You're legally required to notify the DVLA if glaucoma affects your vision in both eyes. That doesn't mean you'll automatically lose your licence. It means the DVLA needs to check whether your vision still meets the legal standard for driving.

You don't need to notify them if only one eye is affected and your other eye has normal vision. Think of it like this: if you can still see well enough to pass the driving test standards, you're usually fine. But if both eyes are involved, even if your sight feels okay to you, the law says tell them.

The notification process is straightforward. You fill in a form online or by post, and the DVLA will ask your eye specialist for a report. Yes, it's another bit of admin, but it protects you legally and helps keep everyone on the road safer.

What the visual field test actually measures

The DVLA doesn't just care about how clearly you can read letters on a chart. They're particularly interested in your visual field, which is your range of vision when looking straight ahead. Glaucoma typically affects your peripheral vision first, the bits you see out of the corners of your eyes.

During a glaucoma assessment, your consultant will test your visual fields using a machine called a perimeter. You look into a bowl-shaped screen and press a button every time you spot a tiny light flash. It maps exactly which parts of your vision are working well and which bits glaucoma might have damaged.

For driving, the DVLA requires a horizontal visual field of at least 120 degrees, with no significant defects in the central 20 degrees. In plain English: you need decent side vision and a clear view straight ahead. Your consultant can tell you whether your results meet this standard.

Understanding glaucoma and driving with different licence types

The rules are stricter if you drive buses, coaches or lorries. Group 2 licence holders (that's HGV and PCV drivers) face higher visual standards because of the responsibility involved. You need better visual fields and visual acuity in both eyes.

If you hold a standard car licence (Group 1), the requirements are more lenient. Many people with well-controlled glaucoma continue driving without issues. The key word there is 'controlled'. Regular monitoring and treatment matter enormously.

Your consultant will work with you to keep your glaucoma stable. That might mean eye drops, laser treatment or surgery. Whatever keeps your vision within safe limits also keeps you legal to drive.

What happens after you notify the DVLA

Let's walk through what actually happens when you tell the DVLA about your diagnosis. First, they'll send you a questionnaire about your condition. Then they'll contact your ophthalmologist directly for a medical report, which includes your recent visual field test results.

The DVLA will review everything and make a decision. They might renew your licence for one year, three years, or until you're 70 (the standard until that age). They might ask for another report after treatment. Or in some cases, if your vision doesn't meet the standard, they may revoke your licence.

That last possibility sounds scary. But here's the thing: if your vision genuinely isn't safe for driving, you probably don't want to be behind the wheel anyway. Most accidents happen because drivers don't realise their vision has declined. The NHS emphasises that early detection and treatment are crucial for preventing serious vision loss.

How glaucoma and driving safety work together in practice

Even if you're legally allowed to drive, it's worth being honest with yourself about how glaucoma affects you day-to-day. Do you find it harder to spot cars coming from the side at junctions? Are you missing pedestrians stepping off the kerb? These are signs your peripheral vision might be compromised.

Some people with glaucoma choose to limit their driving voluntarily. Perhaps only daytime driving, or avoiding motorways, or staying off unfamiliar routes. There's no shame in adjusting your habits to match your capabilities. It's actually the smart thing to do.

Regular eye tests are essential. Your vision can change gradually, so gradual you don't notice it yourself. That's why the eye care specialists recommend monitoring at least annually, sometimes more often depending on your type of glaucoma and how well it's responding to treatment.

Getting the right support for glaucoma and driving decisions

You don't have to figure this out alone. Your consultant ophthalmologist is there to give you honest, professional advice about whether your vision is safe for driving. They understand the DVLA standards inside out and can interpret your test results in that context.

If you're diagnosed with glaucoma or your existing condition changes, book an appointment to discuss the implications for driving. Ask direct questions. Can I still drive? Do I need to tell the DVLA? What happens if my vision gets worse? Your consultant will give you clear answers based on your individual situation.

At LondonOC, our consultant ophthalmologists provide comprehensive glaucoma care tailored to your needs. We'll monitor your condition closely, optimise your treatment, and give you the information you need to make informed decisions about driving and everything else that matters to you.

The relationship between glaucoma and driving doesn't have to mean the end of your time behind the wheel. With proper treatment, regular monitoring and honest communication with the DVLA, many people continue driving safely for years after diagnosis. The key is staying informed, following the rules, and prioritising safety for yourself and everyone else on the road.