Peripheral Vision Test — Check Your Side Vision
This peripheral vision test flashes brief dots toward the edges of the screen while you keep your eyes locked on the center cross. Report which side each flash came from — no peeking.
Sit about an arm's length away, stare at the + the whole time. 16 flashes.
Why side vision matters
Peripheral vision is your early-warning system: it detects motion and light at the edges of your visual field so you can react before you've even looked. Driving, cycling and team sports all lean on it heavily, and several eye conditions — glaucoma most famously — erode it so gradually that people don't notice until a lot is gone. That's why visual field exams are standard in eye clinics.
How this test works
You fixate on a central cross while a dot flashes for a fraction of a second at a random height and distance toward the left or right edge. Because the flash is too brief to look at, the only way to catch it is with genuine peripheral detection. The honest-eyes rule is the whole test: if you glance around, you're measuring eye movement, not side vision. A screen only covers a slice of your real visual field, so this is a fun screening — a clinical visual field test covers far wider angles with controlled optics. Pair it with thevisual acuity testand contrast sensitivity testfor the full vision trio.
Frequently asked questions
What is a peripheral vision test?
A peripheral vision test checks how well you detect objects at the edges of your visual field while looking straight ahead. Clinically it’s done as a visual field exam; this online version flashes dots toward the edges of the screen while you fixate on the center.
What does peripheral vision measure?
Peripheral (side) vision measures your visual field outside the central point of focus. It relies mostly on rod cells, so it’s good at catching motion and light changes but poor at fine detail and color.
What can cause reduced peripheral vision?
Glaucoma is the classic cause of gradual peripheral vision loss; retinal conditions, stroke, migraine aura and some neurological conditions can also narrow the visual field. Sudden loss of side vision needs urgent medical attention.
Why is peripheral vision important for driving and sports?
Side vision is how you notice a car entering your lane or a teammate at the edge of the field without turning your head. Drivers and athletes rely on it constantly, which is why visual field checks are part of driving-fitness exams in many countries.
How this test works: everything runs and is timed locally in your browser, and results depend on your device and conditions. Scores are for casual benchmarking and entertainment — not a clinical, medical or diagnostic measurement.