Driving safe - why DVLA standards matter

It may not be obvious, but having the ability to drive is a privilege, not a right. For many with health or age related conditions, driving safety is dependent on meeting legal medical standards.

Having correct eyesight is a legal requirement in order to hold and retain a UK drivers license. If you’re unsure of the requirements and how to stay safe on the road, Leightons are here to help you understand your responsibilities.

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Who needs a DVLA eye test?

A full DVLA eyesight assessment isn’t required from the outset, but it becomes necessary in specific circumstances, including:

Renewing your driving licence once you reach the age of 70, when eyesight standards are reviewed.
Being referred by a GP or optician due to concerns about your vision.
Declaring or developing a medical condition that could impair your eyesight and affect driving safety.

What happens during a DVLA eye test?

The DVLA eyesight assessment focuses on two essential checks designed to confirm that your vision meets legal driving standards.

Distance vision assessment

In this part of the test, the evaluation focuses on how clearly you can see at a distance, similar to a routine eye test. You’ll be asked to identify letters or numbers on a Snellen eye test chart from a distance, reflecting the legal requirement to read a vehicle number plate from 20 meters. Each eye is addressed individually.

Peripheral assessment

In the second part of the test, your peripheral, meaning side vision, is examined. This is an important factor in noticing other vehicles, pedestrians and hazards. You’ll look straight ahead into a screening device while small points of light appear briefly around the edges of your vision. Each time you notice one, you press a response button.

All Leightons eye examinations include checks to assess whether your vision meets the visual standards required for driving. While we do not carry out DVLA‑commissioned eye tests, your optician will explain the results clearly and advise you if your vision meets current driving requirements, or if further assessment may be needed.

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What is the legal requirement?

Under UK law licensed drivers must meet minimum vision standards for driving. These requirements include:

A driver (wearing glasses or contact lenses if needed) must be able to read a standard-size number plate from 20 metres.
Visual acuity (with both eyes open, or the only eye if the driver has sight in only one eye) must be at least Snellen 6/12 (decimal 0.5).
Drivers must also have an adequate visual field (i.e. peripheral vision / field of vision).
If corrective lenses are required to meet the standard, then the law requires the driver to wear them every time they drive.
If a driver develops an eye condition that affects both eyes, or their only functional eye, or has conditions such as glaucoma, diabetic retinopathy (with laser treatment), double vision, night-blindness, etc., they must notify DVLA. Failure to do so can result in fines (up to £1,000) and prosecution, especially if their vision contributes to an accident.

Is the law different for larger vehicles?

For drivers of larger vehicles such as buses or lorries, these come under another license group, being “Group 2” licenses. Within this group come higher standards including larger acuity requirements, due to stricter field-of-vision standards and limits on the strength of corrective glasses[1].

To meet the Group 2 eyesight standard, you need to be able to see clearly enough with or without glasses or contact lenses. Your stronger eye must see almost as well as normal vision, and your weaker eye must still have some usable vision. The minimum eyesight is visual acuity of at least 6/7.5 measured on the Snellen scale in your best eye and at least 6/60 on the Snellen scale in the other eye[4]. Glasses or contact lenses are allowed as long as they are not very strong prescriptions.

Why regular eye tests are important

Regular eye tests are imperative to driving safety for all those on the road. Vision can deteriorate gradually and can often go unnoticed, especially peripheral vision, night vision, contrast sensitivity and so forth.

For those with medical conditions, e.g. diabetes, glaucoma, age-related macular degeneration, periodic eye checks are even more crucial.

Prescriptions and contact lenses

If you wear corrective lenses, wearing them is not an option if they’re needed. This is because, without them, you may fail the “number plate at 20m” test, or fail to meet acuity standards. That would make driving legally unsafe and unlawful.

It’s also imperative that prescriptions are up to date with regular eye tests including when sight may not necessarily “feel” worse. It’s important that you also disclose all relevant conditions to DVLA of your overall health, in order to protect both the driver and other road users, these include any changes to:

Medical conditions: a new medical condition that may affect driving or, an existing condition that worsens [2]
Vision changes: eyesight falls below legal driving standards, visual field loss, double vision or significant sight impairment [2]
Medication or treatment changes: medication that affects alertness, concentration, coordination or reaction time [2]
Injuries or surgery: an injury that affects physical control, cognition or vision, or you undergo surgery [2]

What happens if standards aren’t met: legal & safety consequences

If the visual standards aren’t meant by the driver, the driver is not allowed to drive abiding the UK law.

In the situation that a driver holds a license, however, later in life develops a disqualifying eye condition (or their vision worsens), the driver is legally required to tell the DVLA. It’s important to know that failure to declare can result in a fine up to £1,000 and possible prosecution, especially if involved in an accident.

Additionally, for licence applications or renewals, failing to meet the standard will lead DVLA to refuse or revoke the licence.

Use of certain aids e.g. bioptic telescopes, is not accepted by DVLA to meet the standard.

In a situation whereby legal restrictions apply (due to failing to meet standards), it’s suggested to make arrangements for alternative transport (public transport, community transport, carers, etc.), to ensure safety and compliance with law.

What the law might change and why it’s relevant

In 2025, there have been growing calls and public concern over the adequacy of the current self-reporting system for eyesight among drivers. An inquest into several fatal collisions, where drivers had substandard vision but retained licences, described the system as “ineffective and unsafe.”

Proposed changes include mandatory eyesight tests for drivers over 70, needing to pass a compulsory eye test as part of the renewal process [3].

As the importance of regular eye tests may be increasing. Get ahead and schedule in your eye test today.

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Sources

[1] Driver and Vehicle Licensing Agency (DVLA). (2016, March 11; updated 2025, September 26). General information: assessing fitness to drive. GOV.UK. https://www.gov.uk/guidance/general-information-assessing-fitness-to-drive

[2] Driver and Vehicle Licensing Agency (DVLA). (2025, November). Assessing fitness to drive: a guide for medical professionals. GOV.UK. https://assets.publishing.service.gov.uk/media/690c6d0a68fffdd77951aab0/assessing-fitness-to-drive-november-2025.pdf

[3] Rider, O. (2025, October 23). Driving licences for the over-70s. House of Commons Library (UK Parliament). https://commonslibrary.parliament.uk/driving-licences-for-the-over-70s/

[4] GOV.UK. (2025). Driving eyesight rules. https://www.gov.uk/driving-eyesight-rules