Night Driving Vision Problems: Causes and When to See a Doctor

Why does night driving feel harder than it used to?

Vision at night is genuinely more demanding than daytime vision. The pupil dilates in low light to let in more light, but this wider opening also increases optical aberrations — small imperfections in the eye's focus system become more apparent. This is why night vision is sensitive to refractive errors and other optical issues that may not be noticeable in bright light 1Ref 1Wallace DK (Chair), Flaxel CJ, Gedde SJ, Jacobs DS, Kopplin LJ, Lee BS, Mah FS, Oetting TA, Varu DM, Musch DC (2026).Comprehensive Adult Medical Eye Evaluation Preferred Practice Pattern® 2025.Framework for comprehensive eye evaluation applicable to night vision complaints, including glaucoma and other conditions affecting low-light vision.

Additionally, the cells responsible for low-light vision (rod photoreceptors in the retina) and the neural pathways they feed decline modestly with normal aging. Most adults notice gradually increasing difficulty with night driving starting in their 40s or 50s, even without any specific eye disease.

What are the most common causes of night vision difficulty?

Uncorrected or outdated refractive error (myopia, astigmatism). This is the most common and most correctable cause. Nearsightedness is particularly problematic at night because distance vision is already compromised, and low-light conditions remove the contrast cues that partially compensate. Astigmatism specifically causes starburst or ray-like distortion around light sources [1, 2].

Cataracts. A cataract is a clouding of the natural lens inside the eye. Early cataracts often produce particularly bothersome nighttime symptoms — glare, halos, and difficulty with oncoming headlights — even before daytime vision is significantly affected. Cataracts are common in older adults and are treated with surgery when they significantly interfere with function [3, 4].

Dry eye. The tear film over the cornea is part of the eye's optical system. An irregular or unstable tear film (as in dry eye) creates optical distortion that worsens in demanding conditions like night driving. Blinking usually temporarily clears the image if dry eye is the cause 5Ref 5Amescua G, Ahmad S, Cheung AY, Choi DS, Jhanji V, Lin A, Mian SI, Rhee MK, Viriya ET, Mah FS, Varu DM; American Academy of Ophthalmology Preferred Practice Pattern Cornea/External Disease Panel (2024).Dry Eye Syndrome Preferred Practice Pattern.Dry eye syndrome causing optical aberrations including halos and blur relevant to night vision difficulty.

Pupil dilation in low light. In people with higher prescriptions or more corneal irregularity, the larger pupil diameter at night exposes more of the optical imperfection and produces halos or glare even without any specific eye disease.

Glaucoma. While glaucoma predominantly damages peripheral vision, significant glaucoma can reduce contrast sensitivity and the ability to function well in low-light conditions 1Ref 1Wallace DK (Chair), Flaxel CJ, Gedde SJ, Jacobs DS, Kopplin LJ, Lee BS, Mah FS, Oetting TA, Varu DM, Musch DC (2026).Comprehensive Adult Medical Eye Evaluation Preferred Practice Pattern® 2025.Framework for comprehensive eye evaluation applicable to night vision complaints, including glaucoma and other conditions affecting low-light vision.

Vitamin A deficiency (night blindness). True vitamin A deficiency is rare in adults in high-income countries but causes classic night blindness. It can occur in people with malabsorption conditions or very restrictive diets.

Anti-reflective coating quality. Very old glasses or lenses without anti-reflective (AR) coating scatter more light and worsen glare from headlights. This is correctable with updated lenses.

What can an eye exam determine?

A comprehensive eye exam 1Ref 1Wallace DK (Chair), Flaxel CJ, Gedde SJ, Jacobs DS, Kopplin LJ, Lee BS, Mah FS, Oetting TA, Varu DM, Musch DC (2026).Comprehensive Adult Medical Eye Evaluation Preferred Practice Pattern® 2025.Framework for comprehensive eye evaluation applicable to night vision complaints, including glaucoma and other conditions affecting low-light vision can identify most of the causes listed above:

• Refraction checks whether glasses are accurately correcting your prescription, including astigmatism
• Dilated exam assesses the lens for cataracts, the optic nerve for glaucoma, and the retina for any other abnormality
• Tear film assessment evaluates whether dry eye is contributing
• Corneal topography (if indicated) maps the cornea's curvature and detects irregularities

For many people, an updated prescription with anti-reflective coated lenses is the entire solution. For others, the exam reveals cataracts or another treatable condition.

Practical steps while waiting for an appointment

• Use anti-reflective (AR) lenses. If your glasses are older, check whether they have an AR coating. Lenses without it reflect more light and increase glare from oncoming headlights. An optician can advise.
• Keep windshield and mirrors clean. Dirty glass scatters light dramatically and worsens glare independently of your eye prescription.
• Check headlight cleanliness and aim. Yellowed or oxidized headlight covers reduce what you can see; repair kits or replacement are available at auto parts stores.
• Avoid looking directly at oncoming headlights. Instead, use the right edge of your lane as a guide when headlights approach.
• Consider limiting nighttime driving if it is causing safety concerns, until you have been evaluated and any corrections are in place.

Night vision glasses marketed with yellow-tinted lenses have not been shown to reliably improve nighttime driving safety and may even reduce contrast in some conditions.

Which specialist should you see?

For most adults with night vision difficulty, an optometrist is an excellent first stop — they can perform a full refraction, assess the tear film, and examine the lens for cataracts. If cataracts are the primary issue, a referral to an ophthalmologist for surgical evaluation may follow. If glaucoma or retinal disease is suspected, an ophthalmologist or subspecialist will be involved 1Ref 1Wallace DK (Chair), Flaxel CJ, Gedde SJ, Jacobs DS, Kopplin LJ, Lee BS, Mah FS, Oetting TA, Varu DM, Musch DC (2026).Comprehensive Adult Medical Eye Evaluation Preferred Practice Pattern® 2025.Framework for comprehensive eye evaluation applicable to night vision complaints, including glaucoma and other conditions affecting low-light vision.

Gale does not provide eye care directly, but a Gale primary care clinician can help evaluate whether your symptoms suggest a systemic condition (such as vitamin A deficiency or uncontrolled diabetes affecting the retina) and coordinate a referral.