How Glaucoma Affects Driving Ability

Safe driving requires clear central vision and adequate peripheral vision. Glaucoma typically leads to constriction of the visual field, sparing the central vision. Many patients with glaucoma also have age-related clouding of the natural lens (cataract), and this can cause an additional decline in vision.

The minimum vision requirements to obtain an unrestricted driver’s license vary by state and can be obtained from the Department of Motor Vehicles for your state. There are specified criteria for visual acuity, which measures your central vision, and for visual field, which measures your peripheral vision.  A visual acuity of at least 20/40 is a commonly used standard. For the visual field, a horizontal field of at least 120 degrees is a commonly used criterion. A special visual field test performed with both eyes open is required to assess the driving field of vision.

Concerns about driving often come up with glaucoma and may be brought to the doctor’s attention by the patient or a family member. Poor night vision and glare from headlights are the most common vision-related reasons that lead people to restrict their driving. If the peripheral (side) vision declines from glaucoma, there could also be difficulty with parking a vehicle, and seeing road signs, lines on the road, or vehicles approaching from the side. There could even be difficulty seeing pedestrians or cyclists. Ideally, the patient will recognize problems with driving and limit themselves.

Various studies have identified different problems associated with moderate peripheral visual field loss from glaucoma. People with visual field loss from glaucoma may be slower to anticipate and respond to changes in road conditions. They may also have more difficulty matching speed when changing lanes and keeping in their lane, especially when navigating curves in the road. A recent study found that some areas of visual field loss may be more associated with driving problems than others (specifically, the left-hand portion of the visual field).

To have the best driving vision, it is important to keep your eyeglass prescription up to date in order to have the sharpest vision possible. Anti-reflective coatings and amber tinted lenses can help decrease glare and improve contrast with both day and night vision. Keep the windshield and rearview mirrors clean. Make adjustments in driving behavior, such as avoiding high speed areas (highways or expressways), driving more slowly, and increasing the following distance between you and the car ahead of you. Driver training courses are available at many rehabilitation centers that can teach the driver techniques to improve their skills. The fear of losing one’s driver’s license and independence may be scary, but safety is the most important goal.

Approximately 4.22 million Americans live with glaucoma, a group of eye diseases that damage the optic nerve. The condition typically begins with a gradual narrowing of peripheral vision, which is so subtle that most people don’t notice it until significant damage has already occurred.

That subtlety is precisely what makes glaucoma so dangerous behind the wheel. Safe driving requires two things from your eyes simultaneously: sharp central vision to read signs and see what’s straight ahead, and adequate peripheral vision to catch the pedestrian stepping off a curb or the car drifting into your lane. Glaucoma chips away at that peripheral field while often leaving central vision intact for years, giving drivers a false sense of security.

Glaucoma can make it harder to spot hazards, pedestrians, and other vehicles, particularly outside a driver’s central vision. It can also affect lane positioning and safe lane changes. Vision loss on the left side appears to pose a particularly high risk for collisions.

Many people with glaucoma also find nighttime driving more challenging because of glare, reduced contrast sensitivity, and poor low-light vision. As a result, those with more advanced disease often avoid driving at night, during rush hour, or in bad weather.

Several practical strategies can help people with glaucoma stay safer behind the wheel, at least in the earlier and moderate stages of the disease.

The fear of losing your license and the independence it represents is completely understandable. But safety has to come first, for the driver, for passengers, and everyone else on the road. The most important thing a person with advancing glaucoma can do is recognize changes in their own driving ability and respond honestly to them. Many patients reach that awareness on their own. Others may need a gentle, concerned nudge from a family member or physician.

Based on a Gleams newsletter article by Eydie Miller-Ellis, MD. Last updated on July 20, 2026. Article reviewed for medical accuracy by the Gleams Editorial Board and by Christine Funke, MD.