Screening tool · 2 min
Night Vision Difficulty Test
Identify low-contrast shapes and letters in nighttime-style scenes.
What this test measures
A short, educational reflection on how easily you can identify low-contrast letters in nighttime-style scenes shown on your screen.
Why it matters
Low-light visual performance affects night driving, glare comfort, and how clearly you see in dim environments. It can be influenced by cataracts, dry eye, and contrast sensitivity.
Who may benefit
Drivers who feel uncomfortable at night, people noticing more glare from headlights, or anyone curious about their dim-light vision.
Disclaimer: This tool is for educational purposes only and does not replace a professional eye examination. Screen brightness, calibration, lighting and viewing distance all influence results. For an accurate assessment, request a comprehensive exam with Dr. Roxanna Gangi, your trusted Optometrist in Toronto and York Region.
How to take this test
- Dim the lights in the room and turn screen brightness to a comfortable medium.
- Hold your device about 40 cm away.
- For each scene, choose the letter you see — contrast gets harder each step.
Take the test
Which letter do you see?
What Affects Night Vision
Difficulty seeing at night may be related to several factors — sometimes alone, sometimes in combination. Most are common and treatable when properly assessed.
Common Contributors
- Cataracts — scatter light and reduce contrast.
- Glare and halos from oncoming headlights.
- Dry eye — unstable tear film increases scatter.
- Outdated or uncorrected prescription.
- Reduced contrast sensitivity with age.
- Retinal conditions affecting low-light cells.
Patients across Toronto, Aurora, Vaughan, Richmond Hill, Thornhill, Newmarket, and York Region, Ontario can book a comprehensive eye exam with Dr. Roxanna Gangi, Optometrist to investigate night driving difficulty, glare, halos, or reduced contrast.
These online eye tests and assessments are for educational purposes only. They do not diagnose eye disease, measure prescriptions, or replace a comprehensive eye examination by an optometrist. If you experience sudden vision loss, flashes of light, trauma, severe eye pain, or urgent symptoms, seek immediate medical attention.
Frequently asked questions
Want a real, in-person assessment?
Online tools are a great starting point, but a comprehensive eye exam with Dr. Roxanna Gangi can detect conditions that screen-based tests cannot — including glaucoma, diabetic retinopathy, and early macular changes.