As the evenings draw in and darker mornings return, millions of UK drivers find themselves spending significantly more time driving in low light and darkness. For many, this seasonal shift brings with it a familiar set of frustrations: glare from oncoming headlights, difficulty judging distances, road signs that seem harder to read and a general sense that night driving requires considerably more concentration than it did a few years ago.
If this resonates, you're not imagining it. Night driving genuinely can become more challenging with age, and for some people the difficulties are a sign of an underlying vision problem that can be addressed.
But glare itself is not necessarily abnormal. Research reviewed in a recent quality-of-vision paper by Dr Stephen Hannan, Group Clinical Services Director at Optical Express, found that measurable haloes occur even in healthy, non-operated eyes and become more pronounced with age. Around 60% of the general driving population report glare as a problem after dark.
Dr Stephen Hannan, Group Clinical Services Director, Optical Express, said:
"Glare and haloes are part of normal human vision, particularly in challenging low-light environments. The important question clinically isn't simply whether somebody sees glare, but whether it has changed, how severe it is and what is contributing to it. The eye, the ocular surface, the person's prescription, their age and the external lighting environment can all play a part."
Why Night Driving Is Harder Than Day Driving
Driving at night places demands on the visual system that daytime driving simply doesn't. In low-light conditions, several physiological and environmental factors combine to make seeing clearly more difficult.
Reduced Visual Acuity in Low Light
Your eyes contain two principal types of photoreceptor: cones, which function particularly well in brighter conditions and support colour and detailed vision, and rods, which are highly sensitive in low light but do not provide the same level of detail. As illumination falls, the visual system therefore operates very differently. Even someone with excellent daytime vision can experience a reduction in visual performance after dark.
Glare from Modern Headlights
Oncoming headlights can temporarily overwhelm the visual system, particularly when the contrast between the bright light and surrounding darkness is extreme. Evidence reviewed by Dr Hannan shows that 89% of drivers in one UK survey believed at least some headlights were too bright. More recent research involving the College of Optometrists and RAC found 94% of drivers reporting that they had been dazzled. Government-commissioned research has also objectively confirmed headlight glare as a genuine, measurable problem.
Dr Hannan said:
"When somebody tells me that modern headlights appear brighter or that driving at night feels more demanding than it used to, we shouldn't automatically assume that something is wrong with their eyes. The lighting environment itself has changed. The same headlight can dazzle a young healthy driver, an older driver, somebody with cataract and somebody who has undergone eye surgery."
Wet roads can amplify the effect further by reflecting and scattering light, reducing contrast and making distance judgement more difficult.
Changes in Pupil Response
Your pupils dilate in darkness to allow more light into the eye and constrict in brighter conditions. Pupil behaviour changes with age, while the ageing eye also develops increased intraocular light scatter and higher-order optical aberrations. These changes matter because standard high-contrast daytime visual acuity does not tell us everything about someone's functional vision at night.
Reduced Contrast Sensitivity
Contrast sensitivity is your ability to distinguish an object from its background. It is particularly important for tasks such as identifying a pedestrian wearing dark clothing, following road markings on a wet road or spotting an unlit object ahead. Evidence reviewed by Dr Hannan demonstrates that contrast sensitivity deteriorates with age and that glare can reduce it substantially. In one experimental setting, glare reduced older drivers' detection of pedestrians by 38%, while mesopic visual function was a better predictor of driving performance than conventional bright-light visual acuity.
Dr Hannan said:
"Being able to read letters on a conventional sight chart is important, but quality of vision is much broader than visual acuity alone. For driving, particularly at night, contrast sensitivity, glare, the ocular surface and the ability to see under lower levels of illumination can be extremely important."
Why Night Vision Can Get Worse With Age
From around our 40s onwards, several normal age-related changes can make night driving noticeably more demanding.
The Ageing Lens
The eye's natural crystalline lens changes throughout life. It gradually becomes less transparent, scatters more light and eventually, in many people, develops a cataract. Research shows that intraocular straylight — the forward scatter of light associated with disability glare — increases particularly after the age of 45. The ageing crystalline lens, changing pupil behaviour, increasing higher-order aberrations and falling contrast sensitivity can all contribute.
Early Cataracts
Cataracts can be particularly noticeable when driving at night because they increase the scattering of light within the eye. Night-driving problems can occur before someone regards their daytime eyesight as particularly poor. Evidence reviewed by Dr Hannan found that 50% of cataract patients reported night glare before surgery, with 31% reporting central glare or a "sunburst" phenomenon.
Dr Hannan said:
"One of the mistakes people can make is waiting until their daytime vision becomes obviously poor before seeking advice. For some patients, the first meaningful indication of lens ageing or cataract is a deterioration in quality of vision — particularly glare, contrast and confidence when driving at night."
Uncorrected Refractive Error
Short-sightedness, long-sightedness and astigmatism can all affect vision quality in low light. As the pupil enlarges at night, more peripheral rays of light enter the eye and optical aberrations can become more apparent. Research demonstrates that halo size is related to pupil diameter and that higher-order aberrations contribute further to glare at night. An outdated prescription that appears perfectly adequate during the day can therefore become much more noticeable after dark.
Astigmatism and Night Vision
Astigmatism can create streaking, starburst or smearing effects around light sources, particularly headlights, streetlights and illuminated signs. Correcting previously uncorrected or inadequately corrected astigmatism may therefore significantly improve someone's quality of vision.
Don't Forget Dry Eye
One frequently overlooked contributor is the ocular surface. An unstable tear film can cause intermittent blur, glare, haloes and light sensitivity, with visual quality changing between blinks. Dry eye should therefore be considered when someone reports fluctuating night vision rather than assuming the problem must be their glasses, natural lens or previous eye surgery.
Dr Hannan said:
"Vision is produced by the whole optical system. A healthy and stable ocular surface is fundamental to good quality of vision, which is why an assessment should look beyond simply asking how many lines someone can read on a chart."
Warning Signs That Your Night Vision Needs Attention
Difficulty driving at night shouldn't simply be dismissed as an unavoidable part of getting older. Arrange an eye examination if you experience:
- Intense glare from oncoming headlights that has noticeably worsened
- Haloes, starbursts or streaking around lights
- Difficulty reading road signs at distance
- Difficulty identifying pedestrians or cyclists in low light
- Fluctuating or intermittently blurred vision
- Night driving requiring significantly more concentration than previously
- Avoiding driving after dark because of discomfort or reduced confidence
Any significant change in vision warrants professional assessment.
The Legal Requirement: Are Your Eyes Up to Standard?
UK drivers must meet the required eyesight standards, including being able to read a vehicle number plate made after 1 September 2001 from 20 metres, with glasses or contact lenses if required. But meeting the legal minimum does not necessarily mean someone enjoys excellent quality of vision in every environment.
Dr Hannan said:
"Driving is a complex visual task. Our ambition shouldn't simply be to scrape through the minimum eyesight requirement; drivers should want the best functional vision they can reasonably achieve, particularly in poor weather and at night."
What Can Be Done?
Get a Current Eye Examination
If you haven't had an eye examination recently, or your night-driving difficulties have changed since your last examination, arrange an assessment. It provides an opportunity to check your prescription and astigmatism, examine the ocular surface, assess the natural lens for cataract and evaluate the wider health of the eye. At Optical Express, the right clinical management plan starts with understanding the individual patient — supported by more than 36 years of specialist eye care, highly experienced ophthalmic surgeons and optometrists, and substantial investment in diagnostic, laser and lens technology.
Update Your Prescription
Sometimes the solution is straightforward. If your prescription has changed or your current glasses or contact lenses are no longer providing optimal correction, updating them may significantly improve night-driving comfort. Tell your optometrist specifically about your night-driving symptoms rather than simply saying your vision feels "worse".
Anti-Reflective Lens Coatings
For spectacle wearers, good-quality anti-reflective coatings can reduce distracting reflections from the lens surfaces and may improve visual comfort when driving after dark.
Laser Eye Surgery and Night Vision
For suitable patients with refractive error, laser eye surgery may provide an alternative to relying on spectacles or contact lenses. Patient selection and individual treatment planning are particularly important. Optical Express reports that 99% of its laser eye surgery patients achieve 20/20 vision or better and 100% exceed driving standards without glasses afterwards.
Dr Hannan said:
"The objective of modern vision correction isn't simply to remove a pair of glasses. It is to provide the right treatment for the right eye and the right patient, taking account of their prescription, ocular health, lifestyle and visual priorities."
Cataract and Lens Replacement Surgery
Where the natural lens itself is responsible for deteriorating vision, cataract or lens replacement surgery may be appropriate. Cataract itself can produce substantial glare and light scatter, and cataract surgery has been shown to deliver major improvements in vision-related quality of life.
For patients considering presbyopia-correcting lens technology, honest counselling remains essential. Modern lenses can provide vision across far, intermediate and near distances, but every optical solution involves trade-offs and some patients can experience glare, haloes or starbursts. Modern PCIOL technology has advanced considerably, however, with smoother optical structures, higher light utilisation and more continuous ranges of vision designed to improve quality-of-vision performance compared with previous generations.
Dr Hannan said:
"There is no perfect intraocular lens, just as there is no perfect natural ageing eye. Our responsibility is to understand what matters to the individual patient, select the right lens for the right eye and counsel honestly about both the benefits and the compromises."
Optical Express reports that 96% of premium lens patients achieve 20/20 vision, with almost all living glasses-free.
Practical Strategies for Safer Night Driving
Alongside addressing any underlying vision problem, simple measures can help: keep the windscreen clean inside and out, make sure headlights are clean and correctly aimed, avoid staring directly into oncoming headlights, reduce speed where visibility is compromised, increase following distance and take regular breaks during longer journeys. Wet roads deserve particular care — they can reflect headlight beams and further reduce contrast, making hazards and distances more difficult to judge.
Don't Let Night Driving Become Something You Dread
Night-driving difficulties are common, but a deterioration in night vision shouldn't simply be written off as getting older. The evidence increasingly tells us that quality of vision is multifactorial. Glare and haloes occur even in healthy eyes. They increase with age. Modern headlights and wet roads can intensify them. Refractive error, astigmatism, dry eye and cataract can all contribute.
Dr Hannan said:
"When somebody struggles to drive at night, the answer isn't to make assumptions about the cause. It is to examine the whole visual system, understand what has changed and identify what we can improve. Quality of vision matters because good eyesight isn't just about seeing the bottom line of an eye chart — it's about being able to live, work and drive confidently in the real world."
As the evenings shorten and winter approaches, autumn is an ideal time to have your eyes checked. At Optical Express, patients benefit from specialist eye care delivered by experienced optometrists and ophthalmic surgeons, advanced diagnostic and treatment technology and clinical governance supported by its International Medical Advisory Board. Optical Express patient data also report that 93% of patients experience an improved quality of life and more than 99% would recommend Optical Express to friends and family.
If night driving has become more difficult, uncomfortable or stressful, don't simply accept it. A comprehensive eye examination can establish whether the cause is your prescription, ocular surface, natural lens or another aspect of your eye health — and whether there is something that can be done to help you see the road ahead more clearly and confidently.
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