Most drivers do not give much thought to whether their vision meets the standard required to hold a licence, particularly if they have been wearing the same glasses for a few years and feel they can see well enough. But vision changes gradually, and the standard of “well enough” while driving at speed at night is considerably higher than many people assume.
NSW Driving Licence Vision Standards
The minimum visual standard for an unrestricted NSW driver's licence, as set by Transport for NSW and consistent with the Austroads guidelines, requires:
- Visual acuity of at least 6/12 measured with both eyes open together (binocular vision), with or without corrective lenses. This means you should be able to read at 6 metres what a person with normal vision reads at 12 metres.
- Visual field of at least 110 degrees horizontally with both eyes open. Conditions such as glaucoma that reduce peripheral vision can affect fitness to drive before central vision is noticeably affected.
- No significant impairment of contrast sensitivity or visual function that could affect safe driving.
If you wear glasses or contact lenses to meet these standards, your licence will carry a condition requiring you to wear them whenever driving.
Commercial vehicle drivers (heavy vehicles, buses, taxis) are subject to stricter standards under the Austroads commercial driver guidelines, including minimum 6/9 visual acuity and specific visual field requirements.
Why Regular Eye Tests Matter for Drivers
Vision can deteriorate gradually in ways that are not obvious in daily life but are significant at driving speeds and in low-light conditions:
- Myopia progression: Even small prescription changes can meaningfully affect the distance at which you can read road signs at night.
- Cataract development: Early cataracts cause glare sensitivity and reduced contrast, particularly at night when oncoming headlights create halos and dazzle. Many patients with early cataracts feel they see adequately in daylight but struggle significantly after dark.
- Glaucoma: Progressive peripheral field loss from glaucoma can go unnoticed in daily life until it is severe, but it directly affects hazard detection and lane awareness while driving.
- Diabetic retinopathy: Changes in retinal function from diabetes can affect contrast sensitivity before central acuity is impacted.
Glasses and Lenses for Driving
If you wear glasses for driving, the right lenses make a meaningful difference to your driving experience and safety:
- Anti-reflective (AR) coating is particularly important for driving at night. Without it, light from oncoming headlights creates internal reflections within the lens that reduce contrast and increase glare. An AR coating significantly reduces this effect.
- Polarised lenses are excellent for day driving in bright conditions, reducing glare from the road surface. However, they are not ideal for night driving and can sometimes make LCD dashboard displays harder to read.
- Photochromic lenses are convenient for drivers who move between indoor and outdoor environments but darken slowly inside a car because the windscreen blocks the UV light that triggers the reaction. They are not a full substitute for dedicated sunglasses for prolonged driving in bright sun.
- Progressive lenses: If you use progressive lenses and find the intermediate or distance zone insufficient for comfortable driving (particularly when checking mirrors or the instrument panel), occupational-tuned progressives with a wider distance corridor may be more suitable.
When to Book an Eye Test as a Driver
Consider booking an appointment at Prime Optometrists Auburn if:
- Your driving glasses are more than two years old
- You notice increased difficulty reading signs at night
- Oncoming headlights seem more glaring than they used to
- You have been diagnosed with diabetes or glaucoma
- You are applying for or renewing a commercial vehicle licence
- Your vision certificate for licence purposes is expiring
Eye tests are bulk billed under Medicare for eligible patients. We can also complete any required vision assessment certificates for licence applications. Book online or call (02) 9761 0005.